Probably both are illegal immigrants.
Love the headline: CA couple... You know, visions of blonde-haired American couple. Seeing the names buried down in the article and who they are affiliated with, I question whether they were a legal couple from CA.
Illegals? Unlikely. They wouldn’t vacay in Mexico if they didn’t have US passports to get back in. They may have been down there for “business” as well as pleasure and their killing not so random. Just a guess.