Absolutely. And Mexico doesn't have a death penalty (they have enough citizens killing each other, they don't need it) and usually intervenes and gets it knocked out of the picture.
Any arrest of a Mexican requires contacting their consulate within hours, as I recall.
http://www.freelists.org/archives/ql06/01-2004/msg00008.html
He is one of 52 Mexican citizens in eight states whose convictions and death sentences are being challenged by Mexico in the International Court of Justice in The Hague. Mexico says the United States violated a treaty guaranteeing that foreigners arrested in this country have access to representatives of their government.[snip]
http://www.nctimes.com/articles/2005/07/26/news/top_stories/20_02_227_25_05.txt
“Absolutely.”
Good. Lot’s of problems in the Denver area with illegal criminal types. I might try going to the consulate and see if I can get a matricula ID card. Wonder if non-spanish speakers can get one?