Charlottesville, Virginia, police have issued an arrest warrant on charges of reckless driving for a man they call a "person of interest" in the disappearance of University of Virginia student Hannah Graham.
Police have not charged Jesse Matthew in Graham's disappearance, but Charlottesville Police Chief Timothy Longo said he believes Matthew was the last person to see Graham.
“I believe Jesse Matthew is the last person she was seen with before she vanished off the face off the earth,” Longo said at a media briefing on Sunday. "But somebody knows where she is. And we want to know who that person or persons are.”
Longo said Matthew arrived at police headquarters on Saturday and asked for a lawyer. After speaking to the lawyer, Matthew left the station without talking to detectives.
Longo said after Matthew left, he was being overtly followed by state and federal officials. Matthew then sped away from police at a high rate of speed.
Longo said the speed was so great that police disengaged from the pursuit.
Hannah’s father, John Graham, spoke publicly for the first time Sunday, appealing to anyone with information to come forward.
“Who saw Hannah?” asked John Graham, during the press conference, with his wife, Sue, standing next to him. “Somebody knows what happened to Hannah.”
The father expressed gratitude to more than 1,000 volunteers who combed Charlottesville where Graham was last seen, on Saturday and Sunday.
“We have been utterly overwhelmed by the generosity of the spirit of all the people we’ve met,” he said. “This is every parent’s worst nightmare. We need to find out what happened to her so it doesn’t happen to anyone else.”
Graham expressed hope that his daughter would be found alive.
"'Hannah is brilliant, resilient, determined and loves life more than anybody else I know."
He read an email from Hannah's former teacher, who wrotte: “If anybody could get through this, it is Hannah."
The chief, in an emotional statement, said Sunday that Matthew was the person seen in surveillance video walking with Graham before she disappeared more than a week ago.
He wants anyone who saw Graham or Matthew that evening to contact police as soon as possible.
Longo thanked people who were involved in the search this weekend as well as those who emailed him from all over the country, saying “you rose to the occasion, you stepped up to the plate.”
Virginia Department of Emergency Management’s Mark Eggeman said nearly 2,000 people searched for clues into Graham’s disappearance. Eggeman said he spent his daughter’s birthday with searchers, saying, “No place I’d rather be.”
Hannah Graham has been missing since early on September 13. She was seen in surveillance video along the city's Downtown Mall.
A man, who police believe is Matthew, is later seen wrapping his arm around Graham's waist. Police say the two then entered a Charlottesville restaurant during the early morning hours of September 13, where the man bought alcohol and later left in a burnt-orange car.
"We have every reason to believe Ms. Graham was in that vehicle," said Detective Sgt. Jim Mooney of Charlotteville police.
Police searched the man's apartment and car and even talked to him -- but stopped short at calling him a suspect. When asked if the man had a criminal history, Charlottesville Police Chief Timothy Longo said he has "had contact with police."
Copyright Associated Press / NBC 7 San Diego