NORTH OLMSTED, Ohio - Nicholas DiMarco was 18 when he died from a dose or heroin laced with fentanyl.

He left behind a grief-stricken father tormented by questions.

"The biggest mistake that I made I looked at my son and I thought of it as a rational, normal person," Fred DiMarco said. "I was like, well he's going to quit. If he doesn't quit, he's going to go to prison for three years. Who would take that risk? He's going to quit. It's killing people. Who would take something that's going to kill them?"

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