Police Tuesday identified a man and a woman who died in what authorities say was a murder-suicide at a Killeen Dollar General store as Erica Denise Townsend-Whitfield, 22, of Killeen and her estranged husband Angelo Myshun Townsend-Whitfield, 23, of Chicago.

Both died of gunshot wounds early Sunday afternoon at the store at 4102 Watercrest Rd. in Killeen.

A preliminary investigation determined that Angelo Townsend-Whitfield walked into the store, shot his estranged wife to death, and then turned the gun on himself, police said.

Angelo Townsend-Whitfield was an active-duty Marine sergeant who was stationed in California, police said.

He joined the Marine Corps in July 2011.

His service record shows no deployments.

The shooting was reported at around 1:10 p.m. Sunday.

“There were employees and customers inside the store at the time of this incident however, there were no threats made to anyone and there were no other injuries during this incident,” police spokeswoman Carroll Smith said.

Witnesses said they heard popping sounds, realized that they were gunshots and then ran out of the store.

Smith says these types of incidents are unpredictable for law enforcement.

"Domestic violence is one of the most dangerous calls that officers can go to because they're, they're so violent at times, and there's emotions involved in it,” Smith said.

As friends and family look for answers to this incident, a spokesman for Erica’s family says what they need most at this time is privacy.

"They would like to be as private as they can, so that they can mourn, so that they can grieve, so that they can get through this,” family spokesman Bishop Ray Gatewood said.

Bishop Gatewood says the family is currently making funeral arrangements for Erica.

Police say the Sunday shooting is the 6th homicide in Killeen this year.

This also is not the first shooting incident at a Dollar General in the city. Police say there was a double murder shooting at a Dollar General store on Stan Schlueter in Killeen nine years ago on the 4th of July.

(Kathleen Serie contributed to this story)