Examine the relevant case files
Investigators canvass Duffy's patrons and employees

Duffy's patron canvass

Duffy's employee canvass

Investigation Day 5 & 7 — Detectives Armstrong and Murphy talked to witnesses at Duffy's Bar & Grill about what they saw the nights of July 3rd, when Andy Fine was there, and July 13th, when Johnny Reagle was there.