J. Colburn with the Houston Police Department said, "I believe he selects it because there's at least two middle schools in that area and that appears to be the age range he's interested in."
All three girls were approached as they were walking home alone from school between 4:15 and 5:00pm. The man asked the girls if they wanted a ride, then exposed himself and drove off.
"They're walking down the sidewalk, he's driving next to the sidewalk, rolls down his window and he asks them if they want a ride," Colburn said. "He gets their attention and once he has their attention, he exposes himself to them."
The victims, two 14-year-old girls and one 13-year-old girl, ran off and were otherwise unhurt. Two of the girls attend middle school and one attends high school.
The suspect is described as a chubby Hispanic man in his mid-30s. He drives a four-door vehicle of unknown make and model. It's believed to be shiny blue or turquoise. There's no license number available.
Police believe the man will strike again, and they worry that the next victim may be hurt. Anyone with information about the suspect is urged to contact police.