The suspect accused of killing Turning Point USA founder Charlie Kirk at Utah Valley University “left evidence everywhere” despite what appears to be extensive planning for the attack, according to a former FBI agent who now teaches criminal justice at the school.

Tyler Robinson, 22, is accused of assassinating the 31-year-old Kirk by shooting him in the neck from a rooftop as the victim was speaking in front of thousands of people in the campus courtyard.

Greg Rogers spent decades as an undercover agent for the FBI and now teaches a class on serial killers and criminal psychology at UVU. He said the assassination would become a case study for current and future students.

The FBI released two photos as they saught a person of interest in the murder of Charlie Kirk at Utah Valley University. (FBI Salt Lake City)

Discord spokespersons have said the company found no evidence that Robinson used the platform to plan or discuss the attack before the shooting.

In addition to working undercover infiltrating biker gangs, radical militias and White supremacist organizations, Rogers also served as a SWAT sniper in multiple FBI field offices and spent time as an assistant U.S. attorney in the Western District of Texas.

One of his major concerns now is the future safety of his students. Kirk has been among the highest-profile speakers at UVU in the seven years Rogers has taught there, he said, and notably the only one to hold a large-scale event outdoors.

“There’s gonna be an after-action report for this,” Rogers said. “And everybody, his security and the campus security, is gonna have a hard time explaining why there wasn’t a drone up in the air. It’s inexpensive. He’s in all black on a white roof. He’d stand out like a sore thumb.”

He said he expects future events to be held indoors with security checks similar to the school’s basketball games.