 The probe continues into the 20-year-old gunman who tried to kill former President Trump at a rally last Saturday. CBS's Nicole Skanga. There's a premeditation here, but as for the motivation, investigators are still doing a full forensic scrub. His family, including his parents, have cooperated, and the FBI has interviewed them along with hundreds of others. Rear crash tests prove car cameras that show you where you're going when you back up and automatic braking systems are working.