A storm is brewing as lawmakers and the public demand answers following the assassination attempt on former President Donald Trump. On Monday, U.S. Secret Service Director Kimberly Cheatle found herself at the center of a heated congressional hearing, addressing security lapses that could have ended disastrously.

Bipartisan frustration has been palpable as representatives from both sides of the aisle have confronted Cheatle and questioned the Secret Service. The shooting in Pennsylvania has led to calls from several lawmakers for Cheatle’s resignation.

Now, the Oversight Project, a watchdog group with the Heritage Foundation, released a report that could potentially link Thomas Crooks, a relatively unknown figure until now, to critical locations in the Washington D.C. area. According to the group’s findings, geo-tracking data from various devices suggests that Crooks had been in close proximity to key sites, including the FBI headquarters and Allegheny Arms—a location of particular interest to investigators.

The Oversight Project utilized mobile ad data—a tool increasingly used in investigative work to track movements and connections. By monitoring devices frequently appearing at both Crooks’s home and workplace, the group has allegedly mapped out a network of locations and times that are critical to understanding the context and potential threats involved.

Their investigation led to several notable discoveries. One device, in particular, tracked to Crooks’s frequent locations, was also reportedly present in a building in Washington, D.C.’s Gallery Place. This area is notably close to an FBI office and was pinpointed on June 26, 2023. Devices linked to Crooks were traced to Plymouth, MA, and Butler, PA, with one of the devices ceasing activity abruptly on July 12th.

The project also reported that on August 30, 2023, a device associated with Crooks visited Allegheny Arms. In total, at least nine devices connected to Crooks were identified, visiting various significant locations within Bethel Park, PA.

The Heritage Foundation, which oversees the Oversight Project, has purposely not disclosed its methodology or detailed the specific nature of the data used to track Crooks’ movements. They cite the “connective tissue” between this task force and various federal agencies like the FBI and USSS, which could potentially lead to conflicts of interest or compromise the investigation. However, they expressed a willingness to cooperate with legitimate investigations and have called for tips or further information to be sent directly to their secure email.

After over a week of confusion, investigators are still piecing together Crooks’ motivations. Earlier on Monday, House Oversight Committee Chair James Comer (R-KY) homed in on the agency’s decision to not place an agent on top of the roof where 20-year-old Crooks was able to fire multiple rifle shots at Trump as he stood on a stage approximately 400 yards away. Cheatle had previously defended the lack of placement, saying the slope of the roof would have interfered with a sniper rifleman’s ability to protect the former president.

Congressman Jim Jordan (R-OH) took his time  with the microphone to pin Cheatle down on whether or not her agency diverted resources away from the rally to instead over-staff First Lady Dr. Jill Biden.

Crooks, the 20-year-old gunman, was seen stalking the perimeter of the rally hours before it was set to begin but was not confronted, according to previous reports. During the rally, local law enforcement discovered him crawling along the ground with a rangefinder as he searched for a vantage point to take the shot, but by the time further response to the site came Crooks was already gone.

The FBI is also investigating why a local police officer backed away from confronting Crooks on the roof literally seconds before he fired the first shot at Trump, narrowly grazing his ear before Secret Service agents tackled him to the ground.