The police now believe the stabbing was a random attack and Martinez did not know her attackers, Newsham said at the press conference.
Authorities reportedly said that Crawford was not cooperative with police following his arrest on Wednesday night.
A blurry surveillance video was released Wednesday showing the person believed to be Martinez's attacker. The brief video showed a man walking down a street, swinging his arm. Police said they have recovered a knife that is believed to be the murder weapon.
Martinez was stabbed multiple times Tuesday night and surveillance video showed her stumbling into a nearby restaurant for help. A news conference is planned at the site of the killing, the 1400 block of 11th Street NW.
The decedent has been identified as 35 year-old Wendy Karina Martinez, of Northwest, DC.
A $25,000 reward is being offered for information leading to a conviction in the case. He has a criminal history and did not corporate with investigators, Police Chief Peter Newsham said the news conference.
"It's unsettling for anyone who lives in this city to see this happen".
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"This is a very isolated incident, you don't see crimes like this very often. It's a very unlikely thing that occurred at this intersection, but at the same time, I'm sure that doesn't bring any level of comfort to the Martinez family".
"This is an outraged community - this is a woman who should be going to work today", Bowser said.
"I can not even begin to imagine what her fiance, what her family, what her mom, what her brother, what her friends are going through right now, and I want to extend our heartfelt condolences to this family", he said.
Her family described Martinez as the "light of our lives" and an "avid runner" as well as "a devout Christian, a wonderful friend, and a driven professional".
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Police and Martinez's family described the victim as an avid runner who worked at an Internet start-up FiscalNote, where she had recently been promoted. "Everything you hope that a daughter and a friend could be", her family said on September 19, NBC Washington reported.
The 35-year-old Martinez had just gotten engaged to her longtime boyfriend, Danny Hincapie, last week and was looking forward to planning her wedding, her mother, Cora Martinez, said.
While detectives canvassed a park area at the corner of 14th and Girard streets, where Crawford was said to have frequented, he walked up to them just after 8 p.m. Wednesday.
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Jet Airways also added that they are, "extending full cooperation to the DGCA for the ongoing investigation of the event". According to reports, 30 out of 166 passengers experienced nose ear bleeding while some others complained of a headache.