Here is the code to the piano lock box in the victims apartment: C, #, C, #, C, #, B, C, #, D , E , D, C, #.

At the end of the investigation, you need to choose the right letters on the keyboard sent from the crime lad. There are 12 letters each stacked 3 high.

First line ... second H, third Y, third Q, first A, first S, third J.

Second line first F, second R, first E, second T, second C, third O.

The password of victim's locker is ACE.

The password of locker of victim's mother is 1614 or 6461.

Book 'em, Louie.