Did border agents use excessive force in a deadly effort to clamp down on immigration? That’s the question that will be posed tonight on PBS when "Need to Know" premieres its investigation into the violent death of Anastasio Hernandez-Rojas, a 42-year-old immigrant who beaten and tasered by San Diego-area border agents in 2010. Hernandez-Rojas later was taken to a local hospital where he lated died of his injuries.

The death has resurfaced into the public spotlight now that shocking new video of the beating has emerged. On the tape, more than a dozen border agents can be seen standing over Hernandez-Rojas as the man pleads for his life, yelling, "¡Nooo! ¡Nooo! ¡Déjenme! [Leave me alone!] ¡Nooo! ¡Señores!"