If you know someone who is drug trafficking in Mexico?

I'm in a situation where I know of an American living in Mexico (Cabo) who is drug trafficking,getting drugs from Thailand,Various places and using his home base in Mexico as a stopping point to do his dealings.He also has been drug trafficking stuff to California.This person is an American who works a vanilla job doing "Time share sales" and lives in this huge million dollar house.Long story short,is there a way to turn him in? How would I go about doing this and whom would I contact? I would like to remain anonymous for fear of retaliation.The only reason I'm getting involved is because he has abused an elderly friends mother and I would like to see him get caught for at least the drug dealing.