This....gentleman, Mr. Juan Leonardo Quintero, an illegal immigrant then, was deported from the USA in 2004 for "indecency with a child".
He came back.
Across the border.
In Houston, he shot and killed a Houston Police officer, during a routine traffic stop, when it resulted in his arrest for coming back.
The police officer was married with 5 children.
I dont care if you believe the USA should have easy or difficult immigration policies...