In your room after the service, there will be persistent knocking on the door and Sam Durkin will enter. After your talk, leave your room and talk to Josh. Back in your room, use your computer - you need a username and password. Look in your inventory to see your business card, which gives you the username "rstone". Click on the clue button for your password, then look in the Yiddish dictionary in your inventory to get your password "yenta".
Read all the mail, then search for "Jack Lauder" to get his address and congregation name. Now search for "Beth Tikvah" to get the address of his synagogue.
Talk to Mrs Lauder to learn about the murder and their clothing business.
Use the computer - you need a password. Thinking back to your email from Josh, you should try all relevant surnames, including "sharma". Look through the ledger and mail to get more information.
Look at the photos on the wall, and you will see the name "E Goldberg". Go through and talk to Rabbi, but he can't help you.
Use your computer to search for "Ethan Goldberg".
In your notes, combine Joe DeMarco and JDM. Talk to Mrs Lauder about Ethan and Joe.
Talk to the Rabbi again, and comment on the "various oddities" you will be given the Rabbi's business card.
Look at the new business card in your inventory, then use your computer to search for "Amos Zelig", to find out about his wife and dog. Log out, then login with username "rabbiz". Click on the clue button, and enter his pet's name "dodger". Read all of his mail.
Enter the pub and talk to the man who follows you inside - this is Joe. Follow him back outside and down to the subway. Answer each of his questions with another question, or you will be stabbed to death. When given the option, show him mercy.
Take the note from the wall to get Zelig's address.
Agree to go out to the balcony. Stall him, then try to grab the gun twice. Climb over the balcony and say you are admiring the view, then try to grab the gun again. During the fight, always answer questions with more questions, and if the Rabbi does not use a question, punch him. When given the option, don't throw him over the edge.