On the crates to the right, there is the first Newspaper to investigate.
Bloodstain on door.
Reflection of gun on roof.
Smith & Wesson Revlover
Detective Floyd Rose
Gun Store Ledger
Errol Schroeder - Updated Murder Suspect
Examine the mailboxes to learn Schroeder is in apartment #2
Upon entering Schroeder's apartment you will encounter your first brawl.
Schroeder's Notebook - Located in the dresser drawer.