Surprisingly, Ian doesn't believe Linda. He made a comment to that effect a couple of months ago (just after Jim's funeral I believe).
Hi Anfunny
I think Ronnie's cameras could still catch him out. Her paranoia over Roxy and Charlie seems to be over now, and I'm hoping the whole point of that storyline was to put the cameras in place to catch Dean out. I don't think anything's going to happen soon though as it unfortunately looks like Matt di Angelo will be in EE for the foreseeable.