Conrad Murray Knotty Strategy for Manslaughter Defense

9/29/2011 12:40 AM PDT

Dr. Conrad Murray
is handling one ultra-important aspect of his defense all by himself -- picking out the snazzy ties he's wearing to his manslaughter trial each day.

Sources connected to doc Murray tell us he is taking a serious, yet frugal, approach to his ties -- sky blue and gold, so far -- choosing to stick with the ones in his closet ... instead of going on a necktie shopping spree.

We're told Murray has plenty to choose from -- the trial could go several months -- and he has two key criteria: no black (major downer) and no small patterns (not good for tv cameras).

Knot for nothin' -- but, we gotta ask ...