Transcript for Man Confesses to Driving While Intoxicated and Killing a 61-Year-Old Vet and Father of Two
videotape that had everyone stopping to listen today. An internet confession. Something a man says he did that killed someone else. Abc's linsey davis tells us about the man begging everyone else not to make his mistake. Reporter: With his face pixilated and voice distorted 22-year- old matt cordle makes a startling confession. I killed a man. I ended up going the wrong way down the highway, directly into oncoming traffic. And I struck a car. Reporter: Inside that car was 61-year-old vincent canzani, a photographer, navy submarine vet and father of two. ON JUNE 22nd, 2013, I HIT AND Killed vincent canzani. Reporter: And online his actions are largely being revered with posts like, "well done young man" and "we need more people like this." Though we did find the occasional post like, "never should someone be rewarded for having the guts to admit they committed a wrong by drinking and driving. According to the prosecutors office, on monday, cordle will face a grand jury and up to eight years in prison. The video is also evidence of an increasing fascination with what some might call a confession culture. Just last month a florida man, accused of killing his wife, confessed to the grisly murder on facebook. In cordle's video he holds something called a promise card, part of a social movement dedicated to bettering humanity through the power of a promise. Cordle has already made one promise -- when I get charged, I will plead guilty. Reporter: And he hopes the public will make a promise too. I'm begging you, please don't drink and drive. Reporter: Linsey davis, abc
This transcript has been automatically generated and may not be 100% accurate.