Twenty years ago, when Dr. Thomas Andrew became New Hampshire's chief medical examiner, there were between 30 and 40 drug overdose deaths per year.

Last year, Andrew had to perform autopsies on about half of the nearly 500 people who died of drug overdoses in New Hampshire.

Andrew found it harder and harder throughout his career to keep up with the caseloads, and after 20 years, he decided to work to prevent those deaths from happening in the first place.

He retired last month, and he plans to pursue a divinity degree to minister young people to stay away from drugs.

To hear Andrew's interview in its entirety, click on the audio player above.