Out for Justice (1991) on Netflix

Drug dealer Richie Madano shoots Bobby Lupo, a policeman in broad daylight and in front of his family. Bobby's friend and partner, Gino Silva upon hearing this, tells his captain that he can find Richie, because he and Richie grew up together but he has to be left alone. So Gino goes to every single one of Richie's hangouts and either misses or was not there when he was. He also leans on everyone who knows Richie. Also Richie's employers are upset with him that they are also looking for him. But it seems apparent that Richie doesn't care if he lives or dies, which makes him more dangerous.