# LI Serial Killer -- Cop? **URL:** \ **Category:** Factual Questions\ **Created:** [April 11, 2011, 2:46pm UTC](https://boards.straightdope.com/t/li-serial-killer-cop/577958 "2011-04-11T14:46:32Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![pinklintango](https://avatars.discourse-cdn.com/v4/letter/p/aeb1de/32.png) [@pinklintango](https://boards.straightdope.com/u/pinklintango)\ **Post date:** [April 11, 2011, 2:46pm UTC](https://boards.straightdope.com/t/li-serial-killer-cop/577958/1 "2011-04-11T14:46:32Z")
It appears [some](http://www.nytimes.com/2011/04/09/nyregion/09bodies.html?_r=1) NY authorities think the LI serial killer may have some law enforcement background, maybe he’s a former cop, etc. It seems like I have heard this idea before on various fictional crime tv shows, books, etc., that the bad cop uses his knowledge of law enforcement procedures to thwart the investigation and avoid capture. My question is, does anyone know of an actual serial killer that was ever a police officer of some sort, either active or retired? Security guards don’t count! --- _[View the full topic](https://boards.straightdope.com/t/li-serial-killer-cop/577958)._