What Did My Late Uncle Do In The Army?

My family was recently going through my late uncle Tuco's possessions. He was in the army back in the 1980s-90s. Unfortunately he got into some bad business after he left the army, and he was killed in a shootout with the DEA in 2009. Nobody in the family knew what his job was in the army, and he was pretty messed up when he got out. Welcome back r/Military. Have a great weekend.