Sounds like maybe he talked to the cops too much.. Poor guy.
Indeed. Firearms instructing, training, experience - whatever... the first words? L A W Y E R
If you are ever questioned by the cops, the only thing a person should say is LAWYER no matter how innocent you think you are.
They are not your friends, and they can and will lie to you to get you say what they want to hear.
Another thing to remember is after a police officer involved shooting, they are given at least 48 hours before they have to provide a statement and they always have their lawyer or a union representative appointed lawyer with them during all questioning.