juan santillaon was shot just two months earlier.2011, in tijuana, this man was killed for using his cell phone to record an agent beating an migrant, and shot between the eyes under a bridge in juarez. in each case the board control justified the killing saying they were threatened by rock throwers. but getting them to speak on the record about anything at all proved difficult. calling from al jazeera america. we're in nogales, arizona, right now. i'm just calling to see if we can arrange an interview and a ride along with an agent down here. >> no. we sent e-mails about starting six weeks ago. >> it just seems are a little opaque. i'm trying to understand why the request was declined. >> what's happened is the border patrol being one of the largest law enforcement agencies in the country, they work with the population that doesn't work back with them. they're not like a police force that is in the same community that has to deal with residents that are upset, that can vote and mobilize against them. it's a population that will be k