I was relayed details about the story years ago that may or may not be true as I probably heard it 20th hand lol. Supposedly the guy also had a .45 on him and drove it into the bar where his gf was cheating on him before later dropping it in the drink. so the whole "we may never know what was going on in his head" crap was possibly a load of horseshit idk. Stories have a way of growing more fantastic as they're retold. You know what I mean if you ever had a teacher have you play chinese whispers growing up. Shit happened before I was born. Another article https://www.nytimes.com/1982/07/12/world/around-the-world-gi-goes-on-a-rampage-with-a-tank-in-germany.html