jamyra gallmon , 21 , has been charged with first-degree murder while armed for allegedly killing david messerschmitt , 30 , on february 9 in washington , d.c. .
the woman admitted to police that she set up the lawyer using a masculine-sounding email address and went to the upscale donovan hotel with the intention of robbing him .
the affidavit stated that the pair got into a struggle and the defendant pulled a knife from her pants and stabbed the victim repeatedly until he fell to the floor where she stabbed him several more times .