Should I make him replace our sons tablet ??

I’m kinda pissed over this. My children’s dad and I aren’t together. We live separately, I have my own place and he has a room at his parents house. Last weekend he came and picked our oldest up (3.5 years old) and he went and stayed a night with him. When he came to pick him up he came in and was helping me get his things together, he picked our sons tablet up and asked me “can he take this with him?” I said yes as long as he monitors him on it and makes sure he’s staying on the kid profile. I bought the tablet for him for his birthday. They left, then the next day he was dropped back off. 2 days later I realized that I’ve not seen his tablet ANYWHERE since he went and stayed the night there. I called his dad and asked where is his tablet did it not get brought back? He says no he doesn’t know what I’m talking about because the tablet stayed at my house and he “didn’t bring it with him.” I reminded him that he picked it up and asked me himself if our son could bring it with him and I said yes. He still claimed that no the tablet was not brought over there. I have tore my house apart room by room looking for the tablet and it is NOT here. I know for a fact that he took it over there, idk if something happened to it and it got broken and he’s just lying because he doesn’t wanna tell me or if it got lost ? I have no idea but I’m pissed. Should I make him buy our son another one? He only played on it a couple times a week but still he really enjoyed playing educational games on there and I myself used it too to read books on audible. I don’t wanna be the one to have to replace it when I already bought it in the first place.