Often the target of protests over its use of force, BART police for the first time Wednesday posted online its annual report on internal affairs investigations of complaints against officers.
"We're doing this to increase our transparency," said Lt. Frank Lucarelli, head of the department's internal affairs unit.
Four of the 66 citizen complaints against officers in 2010 resulted in sustained complaints that the officers acted improperly -- two for lack of courtesy, one for conduct unbecoming an officer and one for not following proper procedures, BART police wrote in the report.
The police force has 206 sworn officers.
To view the report, visit www.bart.gov/ and click on "about BART" and "BART police" and 2010 internal affairs report.
The 66 citizen complaints made in 2010 contrasts sharply with the 13 complaints made in 2008, the year before a BART police officer shot in the back and killed an unarmed passenger, Oscar Grant III.
Since that shooting, BART police have adopted more rigorous procedures for taking and documenting citizen complaints.
"We have a more robust reporting process," Lucarelli said, "and we're much more in that public eye."
He said state law prevents him from disclosing details of the discipline given to the officers for the four sustained complaints in 2010.
Officers used force in 136 incidents during 2010, according to the report.