Spoilers ahead, so read at your own discretion!
Towards end of the movie Grosse Pointe Blank (1997) we learn that Debi's father Bart is being hunted by assassins. After being escorted to his house by Martin he tells Debi: "They're trying to kill me. My testimony." We don't hear much about the details but it's clear that his testimony was life threatening (at least for us, the viewers). Why wasn't he put into the witness protection program? Was it so, just to make the plot easier to bring everyone into the same location without any additional gunfight to tune down the violence?