Alleged road-rage killer arrested after 3-day manhunt

David Desper, 28, turned himself into police and was charged with first-degree murder in the death of 18-year-old Bianca Roberson, according to police.
1:46 | 07/03/17

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Transcript for Alleged road-rage killer arrested after 3-day manhunt
Now to that fatal road rage incident that happened in Pennsylvania and left to teenage girl dead in the suspect is now behind bars after turning himself in. ABC's Diane the city was here with those he tells good morning Diane. Any good morning Bianca Roberson Stanley was in tears as prosecutors announced a man accused of killing her is behind bars. A Roberson was preparing for her freshman year at college when police say she was gunned down over a traffic merged. And prosecutors now say. This was calculated. The alleged road rage killer accused of gunning down a teenager on a highway outside Philadelphia. Is behind bars this is the story. Of a savage. And senseless murder. A massive three day manhunt for eighteen year old Bianca Roberson is killer came to an end early Sunday morning. When authorities say 28 year old David desperate turned himself thin. And was charged with first degree murder. Somebody didn't want her to merge into a lane of traffic. And because of that a young woman is dead debt. This picture from a highway traffic camera shows Bianca Roberson scar and a red pickup truck jockeying for position as the emerged in traffic. That's when police say desperate took out his handgun and shop the recent high school graduate in the head. Investigators released video surveillance collected from homes and businesses nearby it shows a red truck driving away from the scene. Police say they located that truck after desperate surrendered. They also searched the suspect's home where they discover the handgun allegedly used to kill Roberson. Police say this is not a hate crimes simply an act of road rage desperate is now being held without bail. As for the family again they say the arrest hasn't ease their pain Bianco is just days away from attending her college orientation. When a disaster for that Stanley Diane the state of thank you very much.

This transcript has been automatically generated and may not be 100% accurate.

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