DETROIT – It was one of the most horrific drunk driving crashes in metro Detroit. 

Novi jeweler Gary Weinstein lost his family in an instant, when a drunk driver, five times over the legal limit, plowed into the back of his wife's car on May 3, 2005, in Farmington Hills.  

Judy Weinstein, and her 12-year-old son Alex were dead at the scene.  Another son, 10-year-old Sam, later died at the hospital.

Thomas Wellinger, 49, was ultimately convicted on three counts of second-degree murder, with a sentence of 19 to 30 years in prison. 

In his first interview after the accident, Gary Weinstein told me his grief was like a brick in his pocket. 

It didn't go away, but you learned to carry it.

Now, seven years later, he's telling how he copes with that grief and how forgiveness for the man responsible for the tragedy was critical in moving forward with his life.

His story is the centerpiece of a new documentary, "Project: Forgive," a wide-ranging look at the transformative power of forgiveness. 

It's a potent message at a time when our society is reeling from wounds that continue festering: The Wall Street scandal crashing our economy, a city in crisis divided by race and politics, and personal insults we all carry far too long. 

I was also happy to learn Gary has found love again: 37 years after he took Eileen Keegan to his senior prom, they have become life partners. 

He talks about it all in a touching conversation I had with him this morning.

WATCH: Uncut interview with Gary Weinstein