DETROIT — A driver who fatally injured a doctor when striking her and another good Samaritan as they helped people in an overturned car will spend six to 12 years in prison.

The Detroit Free Press reports that 18-year-old Keith Martin was sentenced Monday.

Cancer doctor Cynthia Ray and teenager Sean English were trying to help six teens trapped in a separate rollover crash in April 2017 when they were hit on Interstate 96 in Detroit.

Ray later died. English's right leg had to be amputated below the knee.

Martin pleaded no contest March 13 to operating while under the influence causing death and serious injury.

Martin has insisted he didn't smoke marijuana the day of the crash, but court records show positive blood test results for the chemical in marijuana that gives a high.