Why would he keep the picture

recently talked to my ex, after four weeks of us breaking up, he texted me on valentine day saying he was thinking about me. Days later I called him and I told him I had some things he left at my house and could I get my picture I gave him of me and my daughter back. He said yea give him an hour or two to get himself together so four hours pass I ask him am I getting my picture he says he lost it! Wtf. why would why he tell me he had it then say he lost it? Then says he's mad that he lost it! Wtf... I cursed him something terrible because that picture was a gift, then he texts back,"Yo I got the ****** picture I said that so u wouldn't ask for it back your mean."