The trial of Frederick Dozier Jr., a former San Francisco School District employee charged with assaulting three women in a Mission District crime spree last year, began today with a display of gruesome photos and videotape evidence of the crimes.

Assistant District Attorney Marshall Khine exhibited the evidence during an opening statement in which he described the offenses for jurors in San Francisco Superior Court Department 25.

Khine told the jury of five women and seven men that in each case Dozier attacked the victim from behind, pulling her to a secluded area where he sexually assaulted and robbed her.

In his opening remarks, Dozier’s attorney, Deputy Public Defender Greg Goldman, said the evidence in the case is not sufficient to prove Dozier’s guilt beyond reasonable doubt.

If Dozier is found guilty, he could be sentenced to life in prison. The trial continues tomorrow before Judge Anne-Christine Massullo.