This whole thing sounds like the custodial grandmother wasn't getting any assistance.
The teacher was only fired AFTER she ran off with the student, even though they've been investigating since November.
The school has been investigating but never advised law enforcement?
The grandmother had to file her own charge against the teacher for interference with custodial authority? ...again, where was law enforcement?
Finally, it must be very easy to take a child out of the U.S. through the Mexican border... now that's scary!