More than a dozen special operations soldiers at the center of a drug trafficking probe. Here is that article. If you want to go down a rabbit hole, just go to Google and type in military drug smuggling. A lot have been caught. And those are the most current and the ones reported and not handled internally.
Side note: when i was in the Navy, we got a guy shipped to us from an East coast carrier; we were on a West coast carrier. We worked in the intelligence offices - CVIC. He was one of a handful not arrested for plans to smuggle hash back from a Mediterranean cruise in Top Secret safes. Of course, officers and higher ranking NCOs had to be involved to make that plan work. I don't know how they got caught. I do know that on my first cruise, when we were heading stateside, I was sent TAD (temporarily assigned duty) to be a fully sworn in customs inspector (2 days of training and 2 weeks of gravy work). Because i had a TS clearance, I got to sit on an atomic bomb.

[military.com]