Why did Jack Lira commit suicide?

He had battled lifelong depression according to what I've read.

[deleted]

Depression and alcoholism are a bad combo.

Did anyone notice he was drinking Coors when he was freaking out before he killed himself...?

Swing away, Merrill....Merrill, swing away...

i just watched this movie and did not do any research afterwards BUT throughout the movie, to me he seemed a bit.... mentally challenged? like he's not all good upstairs. he acted like some kid or something.
also i think he had a problem with alcohol and was obsessed with Milk.