Seventh-Step Man Is GuiltyMERCED — Bobby Irvin, 36 formerly assigned here with tb Merced Seventh-Step Founds lion, will be sentenced Nov. I for impersonating a police oJ fleer and battery.Irvin pleaded guilty to th charges in the Merced Superio Court yesterday. He was arrest ed Oct B after a 20-year-ol waitress told the police Irvi: had impersonated an officer an« forced her to stop her car, tha had followed her to her home He was frightened away whei she called to a babysitter in side io call the police;Irvin’s car was stopped late for speeding and the waitress wallet was found in it. Seventh Step is a nonprofit orgatdza tion formed to help exconvict in the transition to a noncirm inal life.