A man who spent a weekend in a Denmark bank cleaning out safety deposit boxes was arrested and convicted following DNA testing on his left-behind bag of urine.

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The 27-year-old Swedish man, whose name was not released, was convicted Tuesday by a Copenhagen court and sentenced to 21 months in prison, The Local reported Wednesday.

The court heard the suspect and another man spent the weekend locked inside the vault of a Copenhagen bank while a pair of accomplices stationed outside the facility fed them information on the locations of guards while the inside men were clearing out 140 safety deposit boxes.

Prosecutors said the Swede threw a plastic bag filled with his urine at a guard while fleeing the bank at the end of the May 2010 heist, which the bank said resulted in $425,000 in compensation being paid to the victims.

Investigators said they identified the suspect by conducting DNA tests on the urine. Police said they have not identified the other three suspects in the case and the stolen box contents were never recovered.