The 16-year-old charged with murder and robbery will be prosecuted as an adult in last Friday's killing of 15-year-old Hector Hernandez-Valdez. Prosecutor Mark Lindquist said the 14-year-old is charged with first-degree murder. The older boy pleaded not guilty Monday in Superior Court, where bail was set at $2 million. Prosecutors allege the victim came to the brothers' home to meet with the older boy, who armed himself with a knife and tried to rob the victim of marijuana and cash. As those two teens fought, prosecutors say the 14-year-old joined in, stabbing the victim with "a large nail." The brothers' mother returned home to find blood and a dead body. She told police the boys told her they were cleaning up "chili."...When she and police returned, the body had been moved to a recycling bin.