LAS VEGAS — A 93-year-old Las Vegas doctor has been sentenced to 10 years in prison for illegally writing prescriptions for painkillers that ended up in the hands of drug addicts and dealers.

Dr. Henri Wetselaar was sentenced Tuesday in federal court in Las Vegas.

A jury found Wetselaar guilty earlier this year of drug and money laundering-related counts contained in a 2011 indictment against him, his medical assistant and a local pharmacist.

Medical assistant David Litwin was convicted of drug counts tied to the opioid conspiracy. He’s scheduled to be sentenced next month.

U.S. District Judge Kent Dawson declared a mistrial in the case against the pharmacist, Jason Smith, after jurors failed to return a verdict on a single count of conspiracy to distribute oxycodone. Dawson scheduled Smith’s new trial for December.