Forgetting things

Hello,

My 24 year old son is Sczhopheria and is off of his Meds. He has been off for 2 months and been very delusional. On Friday morning, I went into his room to tell him to get up and take the trash out. I walked into his room and by his bed was a big kitchen knife. I asked him what was he doing with the knife. He said he didn’t have it and he didn’t know where it came from. We have notice that he will put empty TV dinner trays in the dishwasher and when we asked him did he put it in there he don’t remember. Has this ever happen to any of you? My son was just diagnosed in Sept of 2015. He’s has been hospitalized 3 times since then…