Trump rally shooter Thomas Matthew Crooks purchased 50 rounds of ammunition just hours before the incident, according to reports.
Crooks, 20, bought the bullets from local gun shop Allegney Arms before opening fire at former President Trump in Butler, Pennsylvania, on Saturday evening, CNN reported.
FBI officials had not yet confirmed the report as of Tuesday morning, but noted that they've completed a vetting of Crooks' phone.
"The search of the subject’s residence and vehicle are complete.