Trying to bring a killer to the police

I just had an insane dream last night that I went to a party, it looked like a wedding, somewhere in [hometown removed] and ended up running into a murderer. It was close to my dad’s house and somehow connected, like it may have been him and [name removed]’s wedding. This kid who was my age ended up killing these two girls when they went to this place all alone, he beat the crap out of them to a pulp until they were dead. In the dream I found out it was him and did everything I could to capture him and take him to the police but the entire time I was the only person who knew he killed the girls so no one would help me get him except for a certain few. I remember specifically in the dream when we were in the garage, I was trying to tie him up to get him in the car and he pointed out this certain bottle of chemical and told me to inject him with it so he would pass out. But I felt like he was lying and he knew it’d kill him, I refused because I wanted him to see justice.