.. How do I find out who was in the Grace Group?

After your release from custody, you have a couple of leads to follow, all of them arranged by Durkin.

First, Durkin said he'd send you some information. Check your phone for that file, which is in Rosa's email; it turns out to be a list of people arrested at the Karth House. This will eventually be useful, but not right now.

Second, Durkin also said he'd have Officer Palmer answer your questions. Go back to the police station to get them answered, or at least to reach the same level of bafflement as the police.

Finally, Durkin said he'd tell the doorman at George Ostin's apartment to let you search the place. Ah, now we're getting somewhere.

George Ostin

Once you've done all those things, concentrate on finding Michael. He's the next link in this chain.

Michael

After you talk to Michael, then Madeline, then Michael again, he gives you the names of the rest of the Grace Group members and its leader, all of whom are dead. But of course, that's not a problem for us.

Search for all of those names: Benjiro, Peter Fielding, Jeffrey Dutta, and Heather Goffstein. Only one name gets a result, so go follow up on it.

Peter Fielding

After you've found Peter, go back to Michael, and he'll give you more information about Heather as well.

Heather Goffstein

As for the leader, Benjiro, he's a dead end for now. He'll turn up later, but he's not a concern at the moment.

How do I track down Benjiro?