Federal and California gun control laws being broken by...cops. http://www.dailynews.com/general-news/20170413/atf-found-la-area-police-selling-hard-to-get-weapons-some-that-ended-up-at-crime-scenes
Buying and reselling "off roster" guns, only available to police. I suspect that while the article refers only to federal violations, rhere are violations of state law involved as well because private sales require transfer through an FFL. A lieutenant is reported to have bought 100 "off roster" guns.