About three weeks ago, Dad finally told Dave he wanted him to move out. Dave made a comment to the effect of, "You don't appreciate the work I do around here." Dad was about to say something, then Dave said, "Fine. I'll leave." And we hadn't seen him since.
This morning, Dave arrived with some friends, and began moving stuff out of the house, into his van.
About four years too late.
I'm going to ask Dad if he'll make sure he has Dave's keys and garage door opener once he's removed all his stuff.