Cross-Examination of FBI Agent David Hull Reveals Critical Timeline Gaps in Tyler Robinson Investigation

Enjoying this? Share it with someone who needs to see it.

Up Next

Jennifer Faumuina Details DNA Evidence Collection in Tyler Robinson Trial at Utah Valley University

Jennifer Faumuina Details DNA Evidence Collection in Tyler Robinson Trial at Utah Valley University

14:22

State of Utah Versus Tyler James Robinson Court Hearing Outlines Path Forward in High-Profile Case

State of Utah Versus Tyler James Robinson Court Hearing Outlines Path Forward in High-Profile Case

10:30

Agent David Hull Traces Tyler Robinson's Four Campus Visits Through UVU Surveillance Footage Leading to September 2025 Assassination

Agent David Hull Traces Tyler Robinson's Four Campus Visits Through UVU Surveillance Footage Leading to September 2025 Assassination

34:50

Cross-Examination of FBI Agent David Hull Reveals Critical Timeline Gaps in Tyler Robinson Investigation

Defense attorney Katherine Nester cross-examines FBI Agent David Hull during Tyler Robinson's preliminary hearing, exposing significant investigative gaps including the absence of bullets or casings on the Losee Building roof, conflicting witness descriptions, and the fact that law enforcement didn't know the shooter's identity until Robinson voluntarily surrendered to authorities three days after the incident. The prosecution presents enhanced surveillance video from Utah Valley University showing Robinson's movements on campus, while the defense challenges the authenticity and completeness of the evidence timeline.

Categories: Court Hearings
July 8, 2026

Investigation Leadership and Initial Response

FBI Agent Hull testified that he arrived at Utah Valley University approximately an hour after the shooting occurred, around 1:30 PM on September 10th. He wasn't officially placed in charge of the scene until roughly 2:30 PM, two hours after Charlie Kirk had been removed from campus. During this time, hundreds of law enforcement officers—potentially up to a thousand—responded to what was initially treated as an active shooter situation on campus.

Agent Hull explained that his primary focus upon taking command was assembling an investigative team through their major crimes unit and developing a comprehensive plan. The known crime scenes included the amphitheater area where the tent was located, the Losee Building rooftop, and an area beside that building. Despite extensive searching, no bullets or casings were found on or immediately around the Losee Building roof.

Multiple Persons of Interest Detained

In the hours following the shooting, law enforcement detained several individuals for questioning. One person was initially taken into custody as a potential suspect but was later cleared and released. Agent Hull confirmed that this individual was not the shooter, acknowledging that the initial arrest was incorrect. Several other persons of interest were also interviewed and ultimately cleared during the investigation.

Investigators confiscated at least two firearms on the scene that day—one handgun found in a backpack and potentially others. Off-duty Utah Highway Patrol Trooper Noah Gonzalez, who was present at the event, reported finding a gun in a holster in the amphitheater area, though Agent Hull initially didn't recall this detail until shown the investigative report.

Surveillance Video Timeline Construction

The prosecution presented two versions of compiled surveillance footage from UVU: State's Exhibit 12.1 (enhanced with zooming, red highlights, and some blurred faces) and State's Exhibit 12.4 (unaltered raw footage). Both were admitted into evidence, though the court limited public broadcast of the enhanced version to prevent potential jury prejudice.

The surveillance video captured Robinson's movements during what Agent Hull described as four separate visits to campus on September 10th and 11th. The footage showed Robinson arriving in a distinctive vehicle around 8:30 AM on September 10th, visiting the amphitheater area where Turning Point USA had set up, then leaving around 9:25 AM. He returned on foot around 10:00 AM, visited Chick-fil-A in the Sorenson Center, moved through various buildings, and was seen near the Losee Building stairs before leaving campus around 11:00 AM.

Critical Moments on the Losee Building Roof

The most significant footage showed Robinson returning to campus a third time around 12:15 PM on September 10th, now walking with a noticeable limp and wearing different clothing than earlier. Video captured him climbing the external staircase to the Losee Building roof, rolling over the railing, running to the southwest corner, and assuming a prone position at approximately 12:22 PM.

Agent Hull testified that Robinson remained in the prone position for approximately 15-30 seconds. At 12:23:28 PM, the reported shot was fired. The individual then stood up, moved across the building, and jumped off the northeast corner of the roof at 12:24:42 PM. In the zoomed video, Agent Hull noted that Robinson appeared to be carrying a long, black object in his hand—first clearly visible when he was on the white triangular portion of the roof preparing to jump.

Post-Shooting Movements and Vehicle Stop

After jumping from the roof, surveillance video captured Robinson crossing Campus Drive and entering a wooded area on the northeast side of the campus. Within minutes, at approximately 12:30 PM (early morning hours of the 11th, according to testimony), Spanish Fork Police Officer Goforth encountered a vehicle matching Robinson's description at the intersection of Campus Drive and 800 South.

Officer Goforth made note of the partial license plate during this interaction. When information later emerged about a vehicle matching that description being involved in the incident, he ran the partial plate and identified two registered owners: Tyler Robinson and Amber Robinson. Officer Goforth confirmed he had interacted with a male he believed to be Tyler Robinson during that stop.

Defense Challenges to Evidence

Defense attorney Katherine Nester raised several critical points during cross-examination. She established that the video of the person on the roof showed no distinguishing facial features or clothing details—only after Robinson jumped could investigators observe what appeared to be a pattern on the front of his shirt. Two young men who photographed someone on the roof approximately 10 seconds before the shooting initially believed it was police overwatch for the event.

Nester also highlighted that no one driving by on Campus Drive reported seeing someone carrying a gun, despite Agent Hull's testimony that Robinson crossed the road holding a long black object. The defense attorney pointed out that while the prosecution claimed Robinson held a firearm, no actual gun was visible in the video—only an object Agent Hull interpreted as potentially being a firearm based on his training and experience.

Timeline of Identification

A crucial revelation emerged during cross-examination: law enforcement did not know the shooter's identity until Tyler Robinson voluntarily surrendered to authorities. Agent Hull confirmed that as of September 11th, when Robinson turned himself in, investigators had only identified a "person of interest" based on images released to the press—primarily from the parking garage stairwell footage.

No formal documented timeline had been prepared before Robinson's voluntary surrender on September 11th. Sergeant Bricker later compiled a timeline that Agent Hull incorporated into his September 14th report. Agent Hull acknowledged that he developed his own comprehensive timeline over the course of the investigation after extensive video review.

Robinson's Voluntary Surrender

Tyler Robinson voluntarily turned himself in at the Washington County Sheriff's Office on September 11th, 2025. He was accompanied by his parents and facilitated by someone known to the family who had connections to law enforcement—reportedly one of Robinson's former Boy Scout leaders. Agent Hull confirmed that Robinson drove himself (or was driven by his parents) to the sheriff's office and walked in peacefully, exactly as he had indicated he would do.

Agent Hull testified that Robinson informed his immediate family that he had been involved in the shooting and wanted to surrender. No law enforcement officers arrested Robinson at his home; the entire surrender was coordinated voluntarily. This marked the first time investigators had a name attached to the individual they believed was responsible for Charlie Kirk's death.

Forensic Evidence from Autopsy and Scene

Agent Hull was not present at Charlie Kirk's autopsy but met with the medical examiner afterward. The examiner provided fingerprints, autopsy photos on CD, and bullet fragments collected during the examination. Agent Hull confirmed that Mr. Kirk's personal items were also transferred through chain of custody to be returned to his family.

Defense attorney Nester questioned whether Agent Hull had shared the investigation's conclusions with the medical examiner before the autopsy report was prepared, suggesting potential bias in the examiner's findings. Agent Hull maintained he had not provided investigative information to the examiner, though he acknowledged not knowing how the examiner learned about the case details referenced in the autopsy report.

Ring Camera Evidence and Witness Descriptions

Investigators obtained ring camera footage from a neighbor named Miss Noble, which captured a vehicle believed to be Robinson's on the night of the incident. During the verification interview, the Noble family reported that the driver of the vehicle was bald and that three other people were in the car. Agent Hull acknowledged this testimony during cross-examination, though he had not mentioned these details during his direct testimony.

This description conflicted with other evidence and raised questions about vehicle identification. The defense used this discrepancy to challenge the prosecution's timeline and the reliability of witness observations in identifying Robinson's movements on the night of September 10th-11th.

Scene Preservation and Evidence Collection

Multiple law enforcement agencies participated in securing and processing the crime scene. Agent Hull confirmed that K9 units were present on campus, possibly used in an attempt to track the individual who jumped from the roof, though no results from this effort were presented. The tent and related materials from the amphitheater remained in place for at least a couple of days after the incident.

Agent Hull was not involved in decisions about when to remove the tent or in UVU's subsequent decision to pave over the dirt area beneath it. He learned about the paving only through news reports. The defense raised concerns about evidence preservation, particularly regarding the quick removal and alteration of the crime scene area.

Public Tips and Alternative Suspects

Law enforcement received numerous tips from the public in the days following the shooting, including information about online death threats made against Charlie Kirk prior to his death. These tips were processed through Utah's State Information and Analysis Center before being distributed to various investigative entities for follow-up.

Multiple people contacted authorities claiming to recognize individuals in the released surveillance images, offering potential suspect identifications. Agent Hull confirmed that all credible tips were followed up on to the best of law enforcement's ability, though he did not personally investigate most of them. Each lead that appeared relevant to either the investigation or represented a credible threat was managed by appropriate law enforcement entities.

The Opaque Banner and Line of Sight

During redirect examination, prosecutors addressed questions about the white banner that formed the back of the pop-up tent where Charlie Kirk was speaking. Agent Hull confirmed the banner was opaque—observers could not see through it from either the audience side of the amphitheater or from the tunnel side behind it. Charlie Kirk would not have been visible to anyone on the other side of this banner.

In the extended surveillance footage from the tunnel (breezeway underneath the Hall of Flags), the video showed consistent movement behind the banner area in the time leading up to the shooting. Representatives from Turning Point USA, law enforcement officers, and possibly student body members were moving back and forth, with some individuals retrieving items from vehicles. This testimony established that the area behind the tent was active with multiple people, contradicting any suggestion of a clear, static scene.

Robinson's Physical Condition Changes

A notable observation in the surveillance footage was Tyler Robinson's changing physical condition throughout the day. When Robinson first arrived on campus around 8:30 AM, he walked normally. However, when he returned around 12:15 PM for his final visit, he was walking with a pronounced limp or altered gait.

Significantly, Agent Hull testified during redirect that after Robinson stood up from the prone position on the roof and ran across the Losee Building, there was "no longer a visible input gate" or limp. From the time he rolled over the railing onto the roof until he was last seen in that segment of video, Robinson moved without any apparent physical impairment. The temporary nature of this limping raised questions about whether it was genuine or possibly part of an attempt to alter his appearance.

Weapon Recovery in Wooded Area

A rifle was eventually discovered in the wooded area where surveillance video showed Robinson entering on at least two separate occasions—once during his second campus visit and again immediately after the shooting. The weapon was found on September 10th in the same wooded area located on the northeast side of Campus Drive where Robinson was captured on video descending after crossing the road.

Agent Hull confirmed that the wooded area where the rifle was recovered was the same location investigators had identified through video footage review as being "potentially of evidentiary value." The area was secured, and law enforcement was notified when the weapon was located. Agent Hull was not personally involved in the search for or processing of the recovered rifle.

Enhanced Video Technical Specifications

The enhanced surveillance video (State's Exhibit 12.1) included several modifications to the raw footage. Red oval or circular highlights were temporarily overlaid on the video to identify specific individuals of interest—these circles appeared and disappeared throughout the footage. Some faces in the parking garage footage were blurred to protect the identities of bystanders not involved in the investigation.

The most significant enhancement was the zooming in and out, particularly focused on the Losee Building rooftop sequences. Agent Hull testified that these zoomed portions provided much greater clarity than the original focal point, allowing viewers unfamiliar with the area to track Robinson's specific movements with more precision. The zooming made it "a lot clearer to see" Robinson carrying what appeared to be a long, black object in his hand.

Agent Hull confirmed that none of these enhancements changed the content or accuracy of the underlying video footage. The modifications were purely for clarity and identification purposes. UVU security footage specialist Mr. Olsen provided a written statement (State's Exhibit 12.3) certifying that the recordings in 12.1 were "true and accurate, including timestamps, dates, and camera labels," with the only changes being "some zooms and red highlights which were not part of the original recording."

Officer Weapon Clearing Protocol

When questioned about an unfired bullet found elsewhere on campus, Agent Hull explained standard law enforcement weapon-handling procedures. He testified that officers typically carry rifles in what's called "cruiser ready" condition—meaning there's no round chambered. When an officer deploys with a rifle, they chamber a round. After completing their task, proper protocol requires ejecting the magazine and ejecting the chambered round.

Agent Hull acknowledged from personal experience that during this clearing process, "rounds are dropped or not accounted for" occasionally. Given that hundreds of law enforcement officers responded to the active shooter call and cleared the entire UVU campus with rifles, the discovery of a single unfired round was consistent with standard weapon-clearing procedures. This explained why the bullet was considered "accounted for" and not treated as evidence related to the shooting.

Multiple Camera Angles from Visual Impulse

Turning Point USA's video production company, Visual Impulse, provided four separate video recordings to investigators. Only one of these videos—the angle taken from behind Charlie Kirk while he was speaking, looking out at the audience—was shown during the preliminary hearing. Agent Hull confirmed that additional camera angles and footage existed that had not been displayed in court.

The Visual Impulse footage that was shown captured the moment of the shooting from a direct angle behind Kirk, showing his security team and the audience. This footage provided a different perspective from the UVU surveillance cameras, offering potential corroborating evidence about timing and the shooting's effects. The prosecution's decision to present only one of the four Visual Impulse videos suggested they were strategically selecting which evidence to introduce at this stage of the proceedings.

Video Transcript

Link copied to clipboard!