Patrick N. Ulm, 20, of West Dundee.

One of two men who were charged with robbing another man using a replica gun and stealing his marijuana and THC cartridges in Crystal Lake has been sentenced to three years in prison.

Patrick N. Ulm, 20, of the 200 block of First Street in West Dundee, was charged with aggravated robbery and theft, while his accomplice, Daniel R. Sievers, 21, of the 3600 block of Tamarisk Court in Crystal Lake, was charged with theft.

The incident occurred on March 27 when the two men met with the victim in the 200 block of Terra Cotta Avenue in Crystal Lake, according to Crystal Lake Deputy Police Chief Thomas Kotlowski.

During the meeting, Ulm and Sievers allegedly robbed the victim of marijuana and THC cartridges, which had a total value of less than $500, according to Kotlowski and a criminal complaint filed in court.

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A handgun, which turned out to be a replica pellet gun, was used during the robbery, Kotlowski said at the time of the incident.

Officers investigated and positively identified the offenders as Ulm and Sievers.

Sievers was arrested on April 29 and released from custody after posting bond, while Ulm was arrested later in May.

The charge against Sievers was dismissed in December, according to court records.

On Wednesday, the McHenry County State’s Attorney’s Office reached a negotiated plea deal with Ulm.

In exchange for him pleading guilty to a downgrade Class 2 felony charge of robbery, prosecutors dropped his theft charge.

Ulm was sentenced to three years in the Illinois Department of Corrections and will be required to pay $1,273 in court fees and fines.

His sentence will be served at 50% due to Illinois truth-in-sentencing guidelines. He will be on mandatory supervised release for two years after prison.

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