The priest is still either ignorant or pretending to be, so let's go talk to someone else. Try the doorman at George's apartment.
The doorman says that Lia is a cop. Hmm. Maybe our almost-helpful cop friend can tell us more.
Durkin, however, is only marginally helpful; he confirms that Lia is a cop and her last name is Pierro, but otherwise he's mum. Time for some undercover work.
Switch to Joey and go inside to the back room again. One of these two desks is Lia's.
Right-click on the desk on the right. Among the stuff here, there's a photo of a "cute kid" and an envelope with Lia's home address, which is now on your map.
Lia, Kendra, Emil