There are plenty of ex LEOs in the TSA right now. Most of the ones I came across did it to earn extra income from the feds while they collected a pension from the city. I've even worked with a cop and fire fighter moonlighting in the TSA.

To be honest the ex cops and corrections officers are the ones you dont want to come across. Most of them dont seem to care about termination because they can sit home and collect their pension anyway.