Former NFL linebacker Antonio Armstrong and his wife were shot and killed by their teenage son in their home in Houston on Friday, police say.

Police were called to the Armstrongs’ home around 1:30 a.m. in response to shots fired, the Houston Chronicle reports. Dawn Armstrong died at the scene and Antonio Armstrong died in the hospital a few hours later. KTRK reports that the couple’s 16-year-old son has been charged with murder. One of the couple’s two other children was at home at the time but was not harmed.

Relatives described the Armstrongs as a loving family and say they can’t imagine what could have led to such a situation.

“They kept them busy and they supported them in everything that they did. There was not any mark that they missed with their children,” a cousin of Dawn Armstrong told the Houston Chronicle. “There was nothing that even could possibly have justified this situation. This doesn’t even make sense.”

Antonio Armstrong was an All-American linebacker at Texas A&M and a sixth-round draft pick of the 49ers in 1995. He played briefly for the Dolphins and Rams and then spent four seasons in the Canadian Football League. In retirement he has worked as a personal trainer and was well known in his community as a volunteer youth coach.

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