evidence: Thomas Matthew Crooks appeared in a 2022 BlackRock ad Thomas Matthew Crooks, the 20-year-old gunman who opened fire at a Saturday rally for former President Donald Trump, once appeared in an advertisement for investment firm BlackRock, the company said Monday. [...] "In 2022, we ran an ad featuring a teacher from Bethel Park High School, in which several unpaid students briefly appeared in the background, including Thomas Matthew Crooks," BlackRock said in a statement to CBS MoneyWatch. "We will make all video footage available to the appropriate authorities, and we have removed the video from circulation out of respect for the victims."