Parents are calling for more collaboration between Montgomery County Public Schools and local police following an outbreak of violence in downtown Bethesda that injured at least three students after a high school football game Friday night. Families of students at Bethesda-Chevy Chase and Walter Johnson high schools in interviews said they wanted the perpetrators held responsible but overwhelmingly expressed a desire not to see their athletic teams bear the repercussions for the violent acts of “a few bad apples” via canceled matches or other schedule changes.