Final answer:
The statement about ballistic evidence revealing the speed at which a trigger was pulled is false, as ballistic evidence cannot provide this information.
Step-by-step explanation:
The statement that ballistic evidence can tell a forensic scientist how fast a trigger was pulled is False. Ballistic evidence can provide various pieces of information such as the type of firearm used, the trajectory of the bullet, the distance from which a gun was fired, and whether a firearm has been fired recently. However, the speed at which a trigger is pulled cannot be discerned from ballistic evidence.
For example, if the trigger is pulled and the bullet travels a distance of 100 meters in 10 seconds, the average speed and average velocity would both be 10 meters per second.