Would you say something

So my daughters father watch her at night while I work. Recently something told me to kinda snoop in his room. So when I picked my daughter up from him in the morning I had him take her to brush her teeth before we leave. ( just as a distraction) then I found in his room a bunch of pills that was in a baggy and was colorful and some red liquid in a baby bottle. (Our child is 4 so no baby bottles) i quickly grabbed my daughter and left didn’t say anything but now I’m trying google what could it be. I’m also nervous about taking the baby back over there. I knew he seemed off to me but I figured it was just life some people get down but nope looks like pills. Should I mention it and ask him about it?