I don't think you need to tell him yet that you have copies.

Save that til you need it. I think if any of his family or friends confront him about this act of violence as well as the drinknig and the cheating they can always add

"And don't lie to me.. I heard the recordings... she forwarded them to me"

it would have a lot more impact that way and he woudl have no reason go to your PC since everyone's telling him THEY have COPIES...

If you do want him to know, have your support team tell him they all have copies... don't you tell him YOU have copies.. he WILL go through your PC if hta'ts the case

And yes you can get files that were deleted from a phone, but it is an expensive process... its not cheap.