Follow CBSMIAMI.COM: Facebook | Twitter

ORLANDO (CBSMiami/AP) – As the day progresses, details about the suspected shooter who killed 50 people and injured 53 more continue to trickle out.

READ MORE: Coral Gables Man Refuses To Sell Family House Swallowed By Massive Development

Omar Mateen, the Orlando nightclub gunman, had been licensed as a private security officer in Florida.

State records show suspected shooter Mateen held the firearms license since at least 2011.

READ MORE: CDC’s Cruise Safety Regulations Thrown Out By Federal Court, Delivering Victory For Gov. Ron DeSantis

It was set to expire in September 2017.

It wasn’t immediately clear where, if anywhere, Mateen had worked as a security officer.

An armed guard license in Florida requires 28 hours of classroom training by a licensed instructor.

MORE NEWS: Miami-Dade Leaders Meet To Tackle Elderly Abuse

(TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)