Conrad Murray -- The Ties They Are a-Changin'

Conrad Murray finally pleaded The 5th ... for help with his wardrobe.

Just DAYS after a TMZ poll showed that Connie's ties gave off a GUILTY vibe ... the doc hit up Saks 5th Ave. in L.A. this weekend, and picked up a brand new BOLDER neck piece.

Coincidence??? We think knot.