jamyra gallmon , of washington d.c. , was arrested on wednesday , according to police .
she has been charged with the murder of first-degree felony murder while armed over the killing of 30-year-old david messerschmitt .
police had released surveillance video of a ` person of interest ' who was seen entering the donovan hotel shortly after messerschmitt texted his wife kim vuong at the hotel where messerschmitt was killed on thursday .