
Prosecutors say they will introduce DNA evidence in case against ex-officer charged with murder of Sandra Birchmore - The Boston Globe
Prosecutors will introduce “expert testimony regarding DNA testing" in the case, according to court records.

Prosecutors will introduce “expert testimony regarding DNA testing in this case and [have] provided the results of preliminary DNA testing to counsel” for Farwell, according to a status report on the case filed Thursday by prosecutors and his federal public defenders in US District Court in Boston.
I assume the DNA is from the fetal tissue taken during the autopsy.