The chief wants anyone with evidence that Hassanen's killing was motivated by hate to come forward.
"You think you know someone because of what people say about them, but if people got to know each other, got to know people of different backgrounds", she said, "a lot of the hatred-fueled acts like this wouldn't exist".
The murder of Hassanen has been classified as a "road rage incident" and police are still investigating whether she was also sexually assaulted. Her body was found Sunday evening in Loudoun County.
He says "we're doing a thorough investigation". "We miss Nabra, and we're going to miss her".
Martinez Torres is charged with murder and being held without bond, police said. Fairfax Police said Martinez Torres chased the youngsters with a baseball bat, and catching up with Hassanen and beating her after her friends had scattered.
The public defender's office, which was appointed to represent Martinez Torres, declined to comment.
But flowers left at Hassanen's memorial at the Dupont Circle fountain in Washington, DC, were set ablaze on Wednesday.
Hassanen was remembered as a shining example of kindness and openness during the services. "'Pray at home, ' I tell her". Police say a man fatally beat her with a bat in a weekend road rage incident early Sunday morning, and that it appears the attack was not a hate crime. However, authorities now suspect that Nabra Hassanen may have been raped before she was murdered on Sunday. She's warned her not to attend late-night Ramadan prayers and services with friends, so she won't be a target. "That's what I told him".
Hassanen's friends urged the public not to forget her name, and it's important that we don't - not just because Hassanen was a bright young girl whose life needlessly ended too soon, but because Muslim women should not have to endure violence or harassment simply due to their religion.
Rizwan Jaka, spokesman for the ADAMS Center in Sterling, said he expected anywhere from 2,000 to 4,000 people to attend the funeral services for Nabra Hassanen.
Many who turned out in support of Nabra Hassanen and her family Wednesday said they're fearful for their children's safety after the attack.
Salis said her daughter and Hassanen played together in school. The room was packed with teens in Hassanen's circle, both Muslim and non-Muslim.
Hassanen and more than two dozen teens were en route back to the All Dulles Area Muslim Society mosque in Fairfax County to observe Ramadan.
Nabra's funeral is planned for Wednesday afternoon.
The vigil will be held 6 p.m. Thursday at Federal Plaza, 50 W. Adams St.
Roessler expressed some frustration that the hate crime rumors have persisted despite police efforts to explain what precipitated the incident and what he says a lack of any evidence pointing to a hate crime.
"Not a hate crime", Sergeant Anna Rose said, explaining that there was "no indication [Soloman] was there to desecrate that memorial". The suspect in the murder, Darwin Martinez Torres, 22, allegedly got into an argument with a teen in Hassanen's group who was riding a bicycle, and became enraged.