Hundreds of students at Shoreham-Wading River High School were given a sobering lesson Wednesday on the consequences of drunk or distracted driving.

Alisa and John McMorris took part in a school assembly and used the story of their son's death to urge students to drive safely.

Their 12-year-old boy Andrew was killed last September when a suspected drunk driver plowed into a group of Boy Scouts in Manorville. Police say suspect Thomas Murphy played golf and drank vodka before he got behind the wheel of his vehicle that day. He could face up to 25 years in prison if convicted.

"The biggest thing we want them to learn is, every decision they make, whether good or bad, have positive and negative consequences," says John McMorris.

Alisa McMorris says it's been difficult for her to participate in presentations like Wednesday's. But she says she receives little signs from her son that push her to make a difference.

The presentation is a part of the Choices and Consequences program, sponsored the office of Suffolk County District Attorney Tim Sini.

"One bad decision could impact your entire life," Sini says.

Tara Spohrer, of Mothers Against Drunk Driving New York, says families willing to share their stories, including their grief and the pain of their loss, help save lives.