"According to CBP’s data, incidents of arrests of CBP employees from fiscal years 2005 through 2012 represent less than 1 percent of the entire CBP workforce per fiscal year. 18 During this time period, 144 current or former CBP employees were arrested or indicted for corruption—the majority of which were stationed along the southwest border. In addition, there were 2,170 reported incidents of arrests for misconduct.19
"Allegations against CBPOs [CBP Officers] and BPAs [Border Patrol Agents] as a percentage of total on-board personnel remained relatively constant from fiscal years 2006 through 2011 and ranged from serious offenses such as facilitating drug smuggling across the border to administrative delinquencies such as losing an official badge. The majority of allegations made against OFO [Office of Field Operations] and USBP [US Border Patrol] employees during this time period were against officers and agents stationed on the southwest U.S. border."

Source

"Border Security: Additional Actions Needed to Strengthen CBP Efforts to Mitigate Risk of Employee Corruption and Misconduct (Washington, DC: US Government Accountability Office, Dec. 2012), GAO-13-59, p. 8.
http://www.gao.gov/products/G…
http://www.gao.gov/assets/660…