This is the guy who ran over a black man and laughed that he killed "some nigger." Matthew Martin, 18, from Louisiana struck Sherell Lewis on the highway in Vernon Parish. Lewis had stopped his car on the shoulder to move debris out the way when he was hit by Martin's truck. Lewis was 31 when he died.

Screenshots of a Snapchat conversation are circulating online, which appear to show Martin laughing about the incident. A friend says: "it'll buff out," referring to Martin's dented Chevy and then asks: "The guy die on impact or what." Martin responds: "yes sir ? no he died otw to the hospital."

He added in another Snap: "y'all i just hit a whole guy on the highway ???"

Martin has deleted his Facebook. We have contacted him for comment.

State Police are investigating the crash. Vernon Parish Sheriff Sam Craft told KALB: "I am appalled at the content of the social media messages that were posted after the incident. This post is unacceptable and has no place in our society. The inflammatory words that were used were morally wrong."

#JusticeForRell has appeared in tribute to Sherell Lewis.

A genuine soul was killed today by a hateful bigot.. I need the law to get this right cause if they don't, it will be handled.. one way or another. #JusticeForRell. pic.twitter.com/7ZFMWNeie6 — deshun.™ (@seedeshun) May 30, 2018

?Leesville, LA! This guy here (Matthew Martin) after hitting and killing someone on the hwy, called him a “nigger” and was worried about nothing but his truck! He got on Facebook and acted like her cared but he didn’t! We need #JUSTICEFORRELL!! Retweet! And tag KALB etc! pic.twitter.com/muLbjRHKIG — Quan?? (@CulbertMarquan) May 30, 2018

#prosecutematthew #JUSTICEFORRELL ?? lord i ask that you pls wrap your arms around family & friends. a loved one was lost yesterday by a white man that thinks its funny cause he was the one to hit him. Rell just turnt 31, life is too short. We love you & will get justice ❤️ pic.twitter.com/1GT1TCmBRQ — na$tyyC (@CionnaMarie) May 30, 2018

One of my classmates lost his life today and the piece of crap that hit him had no remorse. Rell didn’t bother nobody and was a stand up guy. He was struck by a car helping someone on the side of the road. #JUSTICEFORRELL https://t.co/pxihjeRwDb — America’s Most Slept On (@CaRp3di3m337) May 30, 2018

One of Matthew Martin's friends defended him on Instagram, saying his words "got twisted." She added: "Matthew knows he's in the wrong for using the words he did but others got taken completely out of context."

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