Mark Alan Wilson, 52, died February 24, 2005, in Tyler, Texas, after intervening in an active shooting outside the Smith County Courthouse. A Navy veteran and downtown Tyler resident, Wilson armed himself with a Colt .45 when gunfire erupted and rushed to protect the shooter’s son. The gunman, David Hernandez Arroyo Sr., was armed with a MAK-90 semi-automatic rifle and wearing body armor. Wilson fired and struck Arroyo in the back, but the body armor absorbed the impact; Arroyo returned fire and fatally wounded Wilson.

The episode continued into a high-speed pursuit during which Arroyo exchanged fire with officers and was eventually shot and killed by police. The courthouse attack killed three people — Wilson, Maribel Estrada, and Arroyo — and wounded four others, including Arroyo’s son and three law enforcement officers.

If anyone was in downtown Tyler that day or knew Mark Wilson, did they see his actions or the sequence of events outside the courthouse?