>> she's getting in. mark, he's going to go eastbound. >> the track's an area known for prostitutes to ply their trade. customers know to go there to get certain types of girls. >> female, black, long braids. >> i've seen them as young as 12 years old. >> all right. let's get it going, sammy. >> sergeant roland holmgren commands a tactical unit recently charged with cleaning up the track. >> imagine if it was somebody who you cared about, who was forced into that type of lifestyle. and then imagine if that was your neighborhood. imagine all the deterioration that that type of element brings from this type of activity in this specific community. it completely deteriorates it and brings it down. >> as many of you know, we've been battling prostitution in oakland for a while. >> today the task force is hitting the track, conducting an undercover sting operation in the hopes of rescuing juveniles and punishing the pimps who exploit them. >> so we've got sammy. sammy's going to be in a gold ford windstar.