Hood of the Living Dead

Hood of the Living Dead is a 2005 directtovideo zombie movie about a regenerative formula bringing the dead back to life.

That night Jermaine is killed in a drive by shooting. Ricky uses his regenerative formula on Jermaines corpse. When nothing happens, Ricky enlists Marco and Kevin to exact his revenge against his brothers killers. Subsequently, Jermaine comes back to life and also pursues his killers.The zombie infection then spreads through flesh wounds, turning the dealers, Rickys girlfriend, and an ambulance crew into zombies. Once Ricky realizes the situation is out of control, he calls his boss, Dr. Richards Victor Zaragoza and tells him of the disaster. Dr. Richards, not wanting the virus to spread out of control, calls in a mercenary to deal with the problem. The group hunts down the remaining zombies, but the mercenary gets turned into a zombie in the process. Ricky returns home with Dr. Richards, who has been infected. The nowundead Dr. Richards attacks Ricky, but the alsoundead Jermaine comes to Rickys rescue by killing Richards. Jermaines reanimated corpse then turns on Ricky, who is forced to shoot his own brother. ........

Source: Wikipedia