Former NFL linebacker Antonio Armstrong and his wife, Dawn, were shot and killed inside their Houston home, and their 16-year-old son has been charged in their deaths.

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When police arrived on the scene, Dawn was already dead, while Antonio was suffering from a gunshot wound to the head and rushed to the hospital, where he later died. Their daughter was also at home during the shooting but is reportedly fine.

Their 16-year-old son has been charged in the shooting, but police have yet to determine a motive.

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The teen was the one who called 911, and authorities who responded reportedly found the gun along with a note that read, “I’ve been watching you.”

“It was kind of the All-American family, that’s why we’re trying to get down to figure out what’s going on in this household,” homicide detective Jimmy Dodson told KHOU.

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“They’re the family that everyone wanted to be like… her and Antonio together, they are what they call a power couple,” Dawn’s cousin, Vaun Lee Armstrong said. “There was nothing left out. There was no neglect or anything. There was nothing that even could possibly have justified this situation. This doesn’t even make sense. It makes no sense.”