Shadows of Paradise (1998)

The story of Nathan "Nate" Vaughan, an ex-SAS commando fighter married to Nicole, a police officer with the Gulf Coast drug squad. Shortly after their wedding and in the midst of their plans to open a private security firm, Nicole is tragically killed in a seemingly senseless shooting by a drug craze kid in a convenience store hold up. Nate falls to pieces. His only friend is Nicole's ex-police partner and they decide to pursue their own form of justice on the streets low life. The death of a rapist/murderer leads to Nate being pursued by both the criminal boss and the police, which leads to twists and turns and the discovery of his wife's assassination... and bringing the killers to justice.