This movie was from the ninety’s, i think. I can only remember two details. 1st is a cop who falls in love with this crazy blonde criminal who he is supposed to be in charge of, and they end up going on the lamb together. The 2nd is that the movie ends with a police chase where cops end up shooting and killing the ex-cop in a truck, and the woman getting out of the truck and killing herself right after.
Sounds a bit like “The Getaway (1994)”.