I saw a movie several years ago on DVD about a murderer who would hide in a house by camouflaging himself to look like a wall in the house. I can't find anyone who remembers the title of this movie or who stars in it.

It's the 1993 TV movie When A Stranger Calls Back.

I'm pretty sure it 'Through The Eyes of a Killer' with Richard Dean and Marg Helgenberger

Sorry Richard Dean Anderson