If this is a suicide
I don't think this has to do with coming off a cycle...
Imagine knowing your women would never be with you if you didn't juice and make good money etc. you never thought she would EVER want you. A girl you thought COULDN'T BE ATTRACTED TO YOU! SO YOU become possessive and incredibly jealous and you are fragile inside. You develop an "I own her" mentality rather than a shared life experiance. She starts slipping away! you are extremely emotionally fragile... You're two loves in life are dissappating away - bodybuilding(with assistance) and your love of your life(YOU NEVER THOUGHT YOU COULD HAVE)...
That is the catalyst for this behaviour compound this with the fact Americans have guns... and there you have it. Its in the heat of the moment and I think he got the "talk".
Coming off a cycle for the most part is quite liberating for most guys. Its a time where you are impervious to the power of the puss, you lose size and feel a bit better. Your mental outlook is fresh and you are less driven and more reflective. Then your sex drive comes back and its all good.