In the early morning hours of October 5, 2015, a shooting at a State Street residence in LaPlace, Louisiana, left two cousins dead and a third man wounded. Travis Gregoire, 23, was found in the passenger side of a vehicle and was pronounced dead at a local hospital. His cousin Sierra Gregoire, 18, was found collapsed near a nearby house, taken to a New Orleans hospital, and died that evening. A third male victim survived after being driven to the hospital by a neighbor.

Investigators later focused on a suspect identified as Djuan Mackey, 26, of Gretna, whom they believe was one of the shooters and that the attack may have involved mistaken identity. In May 2018 the U.S. Marshals Fugitive Task Force arrested Mackey at a Slidell residence and he was jailed on two counts of second-degree murder and one count of attempted second-degree murder. The motive remained under investigation and authorities hoped the arrest would prompt more witnesses to come forward.

If anyone knew the victims, saw activity around State Street that night, or has information not yet shared with investigators, please come forward.