A guard was beaten when three juveniles – one charged with capital murder — escaped a juvenile detention center last night in downtown Houston. Tom Brooks, director of the Harris County Juvenile Probation Department, said one juvenile attacked the guard got his keys and radio. That escaped juvenile then unlocked the cell door for two others. They went downstairs and escaped outside. All three are still on the run. One is a capital murder suspect and the two others are charged with aggravated robbery. The guard was hospitalized, but was later released. No descriptions were provided.