Six members of a violent Hispanic street gang were charged with kidnapping and killing a 15-year-old boy as part of a gang ritual, according to Montgomery County police.

The arrests come nearly four months after the body of Dennys Guzman-Saenz was found at the edge of a stream at a Gaithersburg park. Dennys, a freshman at High Point High School in Beltsville, had been stabbed repeatedly, police said.