A former Geneva doctor has been sentenced to prison for possessing a large amount of marijuana in the basement of his St. Charles home.

Circuit Judge John A. Barsanti last week sentenced 58-year-old Mark G.P. Lewis to eight years’ imprisonment in the Illinois Department of Corrections and assessed a fine of $137,720.

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Lewis on Jan. 17, 2018, pleaded guilty to unlawful possession of cannabis with intent to deliver, Class X felony, and unlawful possession of a firearm without a Firearm Owners Identification Card, Class 3 felony. Judge Barsanti accepted the plea and set today for sentencing.

Kane County Assistant State’s Attorney Kelly M. Orland stated in court that on May 7, 2015, officers from the North Central Narcotics Task Force served a search warrant at Lewis’ St. Charles residence. They found 110 marijuana plants, more than 11,000 grams of processed marijuana, a handgun and ammunition. Lewis’ FOID card had been revoked.

Lewis remains in custody at the Kane County jail, where he has been held since his arrest in lieu of $1 million bail. Bond was revoked upon conviction.

According to Illinois law, Lewis is eligible for day-for-day sentencing. He receives credit for 1,029 served in the Kane County jail.

In addition, Lewis is charged with aggravated criminal sexual assault, Class X felony, and criminal sexual assault, Class 1 felony. His trial in the case is set to begin July 16, 2018.

The charges against Lewis are not proof of guilt. Lewis is presumed innocent and is entitled to a fair trial in which it is the state’s burden to prove guilt beyond a reasonable doubt.