MARIPOSA -- The fourth suspect in the $1.3 million mineral heist at the California State Mining and Mineral Museum on Tuesday pleaded not guilty to attempted burglary and conspiracy charges, according to the Mariposa County district attorney's office.
Christopher Scott Sheffield, 42, entered his plea during a brief arraignment hearing Tuesday morning. His next court appearance is scheduled for Dec. 11. His preliminary hearing is scheduled for Jan. 8.
The other defendants -- Matthew Campbell, 43, Jonathan Matis, 41, Edward Rushing III, 40, -- pleaded not guilty Monday morning. Campbell, Matis, Rushing and Sheffield were arrested last week after an investigation led by the California Highway Patrol.