(WESTMINSTER, Colo.) - A high school student has been arrested in the abduction and murder of 10-year-old Jessica Ridgeway.
Austin R. Sigg, 17, will be tried as an adult, Jefferson County District Attorney Pam Russell said Wednesday.
Charges probably will be filed on Monday, Russell said.
Sigg, who was arrested Tuesday night, will likely face murder and kidnapping charges in death of Ridgeway.
The teenager also will be charged with attempted kidnapping and attempted murder charges regarding allegations that he tried to abduct someone else on May 28 at Ketner Lake, also in Westminster.
Sigg and Ridgeway lived about one mile apart, on opposite sides of Ketner Lake in Westminster, CNN affiliate KMGH reported.
Ridgeway was last seen alive by her mother as the girl left for school October 5.
A body was found days later at a park just five miles from Westminster, and police identified it as Ridgeway's on October 12.
Hundreds of volunteers had searched fields and streets, posted fliers and canvassed neighborhoods since news broke of the girl's disappearance.
Hundreds of local, state and federal law enforcement officers also worked the case.
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