Is it even possible for an alcoholic transient to committ first degree murder??

I don't know enough about the profile of your typical alcoholic transient. Their main goal is probably where the next drink comes from. On the other hand, the likelihood of first degree murder depends upon the personality and the situation. Consider also that some people turn into some real assholes when they're drunk.

Well a drunk person could get the idea that they are angry with a person and consuming more alcohol could feed into the anger leading to thoughts of murder. They could then dwell upon this drunken rage and premeditate the act and go murder the person. Could happen doesn't sound very plausible though.

You have to understand that first degree murder is a legal term, which means that this person could certainly be charged and convicted of first degree murder, but could also very well get off using the alcoholism as a defense.

I believe so, but I have never studied law at the level that you seem to be. Say he's sitting in a bar one night, and gets in a drunken altercation, witnessed by many other customers, with another patron, and thinks to himself drunkenly, "I'm gonna kill that bastard." A few nights pass, and the transient again sees the man, remembers the fight from a few nights before, stumbles up behind him, and stabs him. It happened too long after the original fight to be considered second degree murder.

i know i sure was.