Hard-Broiled Detective
Trap has seen a lot of shit in his life, and it takes a lot to shake his icey demeaner. He is not above cracking the odd dark joke to lighten the mood at work, but for the most part you should not expect him to say more than he ever has to.
When on-duty, Trap is armed with the usual pistol and taser, and carries basic forensic equipment. He has a walkie-talky and a cell' 'phone to keep in touch, and is never caught in or out of uniform without his ever-useful pocket knife.
Trap's motivation for joining the FBI's homocide unit is a pretty predictable one: he witnessed his mother being murdered by a serial killer at the age of twelve. He had grown up in a rough neighborhood and was used to violence, but this was different. This sick fuck killed people just for the shear joy of it. He ran off and got away with it, too.
Trap spent the following years of his adolesence completely focused on one goal: to grow up to be the best homocide detective he possibly could, and see to it that if any other children had to bear what he had, that they would at least have justice afterward. He worked for his local police departmant for several years, and even became sherrif, before he was recruited by the FBI.