The two women were found in a burning car that had been stolen.
Police say those killings are linked to a January 2009 slaying of another Prince George's County nurse mother and daughter who were found shot to death inside their locked home. The girls in each case were students.
Suspected Mother-Daughter Killer Indicted
A Prince George's County man is officially charged in the murder of a woman and her daughter in Largo. Police believe he is also responsible for another mother-daughter murder in the same neighborhood.
(Published Tuesday, July 27, 2010)
An FBI profiler had concluded last year that the two slayings weren't connected. Police say Scott masked his crimes to throw off investigators.
Scott is in custody on federal gun and sex charges.