An 18-year-old Island Lake man slipped a small piece of razor blade in his mouth, strapped a condom containing someone else's urine to his leg and walked into the McHenry County courthouse Monday intent on duping a drug test, authorities say.

Unfortunately for Justin C. Head, his plan came apart in a washroom at the county's probation department, and instead of walking out of the courthouse with a clean bill, he walked into the county jail with a felony charge.

Head, of the 100 block of South Circle Drive, is charged with defrauding a drug and alcohol screening test, a Class 4 felony punishable by a maximum one to three years in prison.

He was arrested when an official in the probation department caught him with a piece of razor blade he had smuggled into the courthouse in his mouth, sheriff's Sgt. Michael Cisner said.

Head initially claimed he was planning to use the razor to cut himself and drip blood into his own urine, saying he had heard that it would result in a clean drug test, Cisner said. But when questioned further, Cisner said, Head admitted he also had brought another's person urine into the courthouse to pass it off as his own.

"He was going to cut (the condom of urine) open with the razor blade and use it as his sample," Cisner said. "He got caught."

Court records indicate Head was required to undergo the drug test as part of a court supervision sentence he received last year in a 2008 misdemeanor marijuana possession case.

A judge set Head's bond at $10,000 Tuesday morning, and he remained in custody at the county jail late in the day unable to post the $1,000 cash needed to go free. He is scheduled to return to court Thursday.