You can't help but feel outrage that nobody stopped him... that the public wasn't sufficiently warned that any of these boys, these kids could have known there was a serial-killer stalking them.
When the police officers (John Balcerzak and Joseph Gabrish) arrived, Dahmer managed to convince the them that it was a gay lovers' quarrel and the officers let Dahmer take Sinthasomphone home again.
Can you imagine the horror of escaping torment and certain death, only to be handed right back to your tormenter by the police?
... reading the other wikipedia article, Dahmer had also performed an experiment on him that would've also impared his cognition pretty severely. I'm not going to write the details since it was NSFL, but I'm surprised people didn't notice it.
For instance, when they caught him, the front passenger seat of his car was apparently bloodsoaked, but was never matched to any known/suspected victim. A fair amount of evidence suggests that he had at least a part-time accomplice as well. All sorts of unknowns, as he still maintains complete innocence to this day.
He had been killing people in Oregon, on business trips up there and the folks up there theorized that something like this was happening and had been working credit card gas purchase, car rental, and airline ticket info and from what I read, right around the time he got arrested in Ca. his name was coming to the top in Oregon.