More details are emerging in the aftermath of an assassination attempt on former president Donald Trump at a rally in Butler, Pennsylvania over the weekend. Law enforcement continue to investigate 20-year-old Thomas Matthew Crooks, who was killed on Saturday, in search of a motive behind the shooting and to uncover how the incident could have occurred.

In an update from the Federal Bureau of Investigation on Monday, a statement revealed that specialists have gained access to Crooks’ phone and “they continue to analyze his electronic devices.” The FBI’s statement added that the search of Crooks’ residence and vehicle were completed. Nearly 100 interviews of law enforcement personnel, event attendees and other witnesses were conducted.