Minneapolis police chief Tim Dolan is defending the officers involved in a controversial traffic stop. Dolan has asked the FBI to sort out what happened when officer Richard Walker pulled over motorist Derryl Jenkins around 3 a.m. on February 19. A squad car camera video shows Jenkins getting out of his car, contrary to Walker's orders. A struggle began and Walker called for assistance, bringing a handful of other police who punched and kicked Jenkins while he's being held face-down in the snow. Jenkins later received several stitches above his eye. Dolan told MPR News the officers will stay on duty during the investigation.