It’s a curious thing...when you talk Skittles on the street...it actually means Dextromethorphan (DXM). When you take excessive amounts of DXM...you start to hallucinate...in essence, you think and react to things that just aren’t your typical reaction. You could do something really stupid, and never even remember what you did until your drug episode ended.
It’d be curious to know if there was a blood test done on the victim in this case....but my guess is there wasn’t any blood test.