Disgraced former Honolulu police officer James Leslie Corn Jr. is back behind bars.

U.S. District Senior Judge Helen Gillmor ordered Corn to jail Wednesday for three weeks for violating the terms of his supervised release. She also imposed a new 33-month period of post-prison supervision.

Corn, 31, admitted yesterday that he failed to submit to drug testing on Aug. 15 and Jan. 17. When he did show up on Jan. 19, he tested positive for cocaine use.

Authorities took him into custody Monday.

Corn also admitted yesterday that he took another unprescribed substance to deal with back and neck pain he suffered in an automobile accident last month.

He said his doctor offered him Vicodin, but he refused. He did not ask his doctor for a non-narcotic alternative or disclose that he is a drug addict and on supervised release.

Corn was a police officer when he was arrested in August 2005 for accepting $1,000 to provide protection for a drug deal.

He pleaded guilty to being a cocaine addict in possession of two firearms. He sold one firearm to an undercover police officer for $200 in February 2005. Police found the other in his car when they arrested him in the August drug deal.

In a separate case, a state jury found him guilty of threatening a tire shop owner who refused to provide Corn a free replacement tire for a damaged one in February 2005. Corn left the Police Department in August 2006 after 4 1/2 years of service.