There will be a quick follow up some time in the future when you're in Diamond City. Basically everyone's family members start asking questions about the whereabouts of the people involved in the drug-deal-gone-wrong. It's then up to you to spin it whatever way possible.
As for Trish.. I'm not sure what happens to her. I think she's one of Marowski's guys, so you could check the hotel in Goodneighbour. I killed her after she gave me the location though, so I'm not 100% sure if she'll be there.
There are no drugs in there besides the ones in the yellow crates at the actual meet-up, from my understanding.
I spared the ghoul woman but the bartender from diamond city killed her. Then I got everyone asking all sorts of questions. Problem is I got fingered by Marowski... So I went to confront him for these "lies" and there is no dialog. Guess I could just kill him but I don't need all of Goodneighbor shooting me.