. >> the amount of executeny, attention, and frankly the lack of being able to work with the public as a result of that increased suspicion that the agents are involved in excessive force. >> reporter: reform commissioner gil kerlikowske says the shootings, all before his time on the job, harms his relationship with the community. he thinks cameras will vindicate the majority of his agents and hold accountable the overly aggressive. >> we've had almost 400 assaults on border patrol agents. almost every single one of those in the southwest border. help your agents end violent situations? >> most of the experience with body worn cameras in law enforcement has been that it has actually exonerated an agent or an officer, because it's one additional piece of evidence about what occurred. >> reporter: the united states today spends more money on border control than ever before. more agents, more technology, more weapons. $18 billion a year, 8,700 hundred cameras watching the wall, watching the ports of entry. from helium balloons the terrain. and soon cameras on the agents themselves at a co