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Paul Sancya, Associated Press
Liz Lupo, second from left, shows a sign in honor of her mother, Marianne Lupo, a former patient of Dr. Farid Fata, outside federal court, Monday, July 6, 2015, in Detroit. Patients of Fata received "stunning" doses of a powerful, expensive drug that exposed them to life-threatening infections, an expert testified Monday as a judge heard details about a cancer specialist who fleeced insurance companies and harmed hundreds of people.

DETROIT — Patients and their relatives are telling a judge how a Detroit-area cancer doctor spoiled their lives with excessive treatments and misdiagnoses while he collected millions of dollars from insurers.

About two dozen people are expected to speak Tuesday at the sentencing of Dr. Farid (Fa-REED') Fata, who pleaded guilty to fraud, money laundering and conspiracy.

They're talking about the devastating, long-term consequences of chemotherapy and other treatments — long after cancer disappeared or even when they didn't have cancer.

Don Crabtree was a patient of Fata. His wife, Marietta, read a letter written by Don before he died in December. He said it was his "dying wish" that Fata get life in prison.

Fata will likely get his sentence Thursday or Friday. The government is seeking 175 years in prison.