US Customs and Border Protection is the nation's largest law-enforcement agency, with more than 44,000 officers. But its internal affairs department is understaffed and in need of reforms, according to a Homeland Security Department report out this week.

The report also criticizes the border patrol for a dismal lack of accountability when it comes to hundreds of shootings by agents, some of them deadly. In the past decade, no agent has been formally disciplined for killing someone through the use of force.

For more, we're joined by Bob Ortega, senior reporter at the Arizona Republic.

To hear more about this, click on the audio player above.