The center was so full that the service overflowed into the parking lot in the 80 degree heat.
At the ADAMS Center Tuesday, Chaplain Joshua Salaam said Hassanen was a lovely and thoughtful young woman who encouraged her friends to "give to people who are in need, even if it's your last dollar", and to "befriend people who other people don't like". "I said, 'Be careful when you wear the hijab'".
The murder of Hassanen has been classified as a "road rage incident" and police are still investigating whether she was also sexually assaulted. After hitting the girl, he took her away and killed her.
Ibrahim Hooper, a spokesman for the Council on American-Islamic Relations, attended the funeral and said that Nabra's death has brought profound grief both to the local Muslim community and others around the country.
"It's a pain that I don't think any of us would be able to describe", said Hurunnessa Fariad, spokeswoman for the All Dulles Area Muslim Society (ADAMS). She and the other girls in the group were wearing abayas, a robe-like dress worn by Muslims, and some were wearing headscarves.
Mourners leave messages in chalk on the walkways during the vigil at Lake Anne Plaza for Nabra Hassanen, who was murdered Sunday on her way back to an overnight event at the All Dulles Area Muslim Society, in Reston, VA, United States on June 21, 2017. "We have a long-standing relationship with the ADAMS Center, and our hearts go out to everyone in our Muslim community and beyond for this tragic crime". An autopsy revealed her cause of death as blunt force trauma.
Police say a man fatally beat her with a bat during a weekend road-rage incident, and that it appears her attack was not a hate crime.
But her family believes otherwise.
Nonetheless, the killing has come amid a number of violent attacks on Muslims, leaving many deeply suspicious that Hassan had been targeted for her religion.
The Daily Beast reported that Torres has been locked up for the violent attack on Hassanen, raising fears that this was a hate crime. "She has Muslim clothes".
The chief acknowledged that many people still strongly feel that it must have been a hate crime. "We must come together to send an opposing message that all people, regardless of their religious or ethnic background, are safe, welcome and protected".
"That is the highest number since 2001, when the al Qaeda attacks on NY and elsewhere drove the number to its highest ever level, 481 hate crimes", according to Mark Potok with the Southern Poverty Law Center. "There is no evidence that this incident is related to the memorial held in the park the previous evening", Park Police said in a statement. Later, he chased the teens on foot, and majority were able to flee.
What's triggering hate crimes in the US?