Mutilated body parts of a missing 12-year-old have been discovered entombed in chunks of fresh concrete that oozed blood.
Police arrested seven people Sunday for investigation of murder in the death of sixth-grader Juan Delgado, last seen Tuesday and reported missing Thursday. The seven people lived near the suburban lawn where one of two concrete blocks was found Saturday.
Police Capt. John Rees listed the evidence recovered from a tool shed that ties the seven people to the grisly murder: "Cement bags. Plastic bags. Cutting instruments. Blood."
An autopsy will be performed to determine the cause of death.
Police were called to a home Saturday by a resident who saw blood oozing from a 200-pound chunk of concrete about the size of a five-gallon paint can.
"There was blood oozing out of the bottom of the block onto the curb and flies orbiting about," Rees said. "If you looked really close you see some tissue, but you couldn't see what the tissue was."
A second concrete block containing body parts was discovered later Saturday less than a half-mile away, near another home in this suburb 20 miles southeast of Los Angeles.