But Anthony Guglielmi, the department's chief spokesman, said no charges had been filed and that the case remains ongoing.
Word comes after Joan Floyd, president of the Remington Neighborhood Association, told The Sun she had spoken with a detective on the case who notified her of an arrest. Last night, Floyd told residents at the community association meeting that detectives told her they were closing in on a suspect, which a commander from the Northern District confirmed.
We'll post updates as they become available.
The arrest in the stabbing death of Blackwell comes as residents in the Remington neighborhood mount an effort to try to spark tips in another stabbing death of a woman inside her home - the 2008 killing of 74-year-old Nancy Schmidt.
Earlier today, we posted a YouTube video uploaded by a woman identifying herself as Blackwell's older sister, in which she addressed the killer: "You may be pondering if you are going to get away with this…You may be even trying to rationalize in your head that she deserved this for whatever reason and you may even elude the authorities, but let me tell you something, you can't elude God."