SuzanneMorphew

If we consider Barry’s state of mind - it’s easy to see that he was pissed.He called/texted Suz over and over on the drive home.

Meanwhile, Suz was sexting with Libler and had just told him the web page name to see her (nude).

My final guess is that Suz was nude (partially?) on the bed cutting a video.

Barry (already steamed) heard her passionate narrative through the bedroom door.

Thinking there was a dude with her, her shouldered the door (damage to molding).

Suz bolted for the bathroom and Barry caught her and strangled her on the tile floor.

Any bodily fluids would easily have been cleaned up.