During Wednesday's preliminary hearing of Perry Alexander, an African-American motorist who was allegedly beaten by the Gardena Police Department during a routine traffic stop last year, his attorneys will grill cops about the disappearance of 14 minutes of pivotal dash cam video, RadarOnline.com is exclusively reporting.

As RadarOnline.com previously reported, Alexander was arrested on March 16, 2011, after he was pulled over by the police for an alleged traffic violation.

The Gardena Police Department in Southern California are being accused of assaulting an African-American motorist, who was apprehended and charged with felony resisting arrest -- and the alleged beating was captured on video, RadarOnline.com is exclusively reporting.

Perry Alexander was arrested on March 16, 2011 in Gardena, after he was pulled over by the police for an alleged traffic violation.

PHOTOS: See Perry Alexander’s Beating He Allegedly Received At The Hands Of Cops