Trump Jr. says father is 'changed man'

In a private phone call with Robert F. Kennedy Jr., former President Donald Trump said the bullet "sounded like the world's largest mosquito."

RFK Jr.'s son posted on X a video of the call, which was filmed from what looks to be RFK Jr.'s hotel room. RFK Jr. had Trump on speaker phone.

The younger Kennedy, Bobby Kennedy III, removed the post after his father said on X that he was "mortified" it became public.

Trump also told RFK Jr. about the phone call he received from President Joe Biden after Saturday's assassination attempt.

"It was very nice, actually. He called me, and he said, 'How did you choose to move to the right?' (Inaudible) Everybody's looking straight on," Trump said. "I said, 'I was just showing a chart.'"

Thomas Matthew Crooks, the 20-year-old suspected gunman, planned to attend Robert Morris University this fall, according to a school spokesperson.

Robert Morris University is a private, four-year university located outside of Pittsburgh.

"We have been in touch with law enforcement and stand ready to assist in their investigation," school spokesperson Brian Edwards said.

Crooks had earned his associate degree in science from a local community college and graduated in May with high honors.

He was accepted into both RMU and the University of Pittsburgh, a public-research university also a close drive from his home in Bethel Park, Pennsylvania.

A spokesperson for the University of Pittsburgh said Crooks was told in February that he could attend this fall semester as a transfer student. In March, Crooks informed Pitt that he would not attend.

A minute-by-minute analysis of multiple videos from Trump's rally in Butler, Pennsylvania, on July 13.

Visual Timeline: How Donald Trump's assassination attempt unfolded

The suspected gunman who attempted to assassinate former President Donald Trump at his campaign rally Saturday purchased 50 rounds of ammunition ahead of the event, according to a bulletin from the Department of Homeland Security and the FBI Monday.

Thomas Matthew Crooks purchased the rounds from a gun and ammunition shop in Bethel Park, Pennsylvania, according to officials.

The bulletin notes that two improvised explosive devices were found in the shooter's car and one at his home.

"Over the last several months, Crooks received several packages, including some marked as possibly containing hazardous material, according to a review of his shipping history," officials wrote.

Officials also warn of future "follow-on or retaliatory acts of violence in response to this assassination attempt."

"We cannot rule out the possibility that some DVEs (Domestic violent extremists) or other actors may attempt follow-on or retaliatory acts of violence in response to this assassination attempt."