Javier Pena who is depicted by Pedro Pascal in Netflix's Narcos is a real life Aggie who helped get Pablo Escobar.
Also,
http://m.imgur.com/LrWDqUh (This was the best image I could get because Netflix doesn't allow screenshots.)
Here are two rings that look like they could be Aggie rings in the fourth episode (30 minutes and 44 seconds in) on Netflix. They seem to be of DEA agents in archive footage.
I'm not positive if they are or not.
Edit: turns out I didn't scroll down far enough on the biography I read for Javier Pena. The first header said he was educated at Texas A&M, then the body of the biography said Texas A&I in Kingsville. The rings above still look like they could be Aggie rings.