Investigators are already reviewing 80,000 pages of records from the state police and the attorney general's office.
Over the next few months, investigators will review them for any hints of payoffs.
Investigators will interview witnesses and review the repair procedure that workers used.
The memo also directs investigators to review "mental health and medical records."
He said investigators were also reviewing videotape from a surveillance camera inside the shop.
The investigators reviewed 6498 abstracts and included 648 articles in the analysis.
These are law enforcement agencies where "investigators review fraud reports and begin the prosecution process."
He said investigators are reviewing statements from witnesses and hope to bring charges against other suspects.
He said that investigators were speaking with witnesses and reviewing video from surveillance cameras.
He said investigators were still reviewing video recordings taken inside the studio that night in an effort to identify potential witnesses.
