It's a shame that we are still perseverating over this. This is now proof by semantics. I am not going to lob sources back and forth anymore. DNA "on Morgan" does not literally translate to on her remains. It may, but it does not matter.
MH's death is an open, criminal investigation. The investigators cannot reveal where any forensic evidence was obtained, as it would be a fundamental breach to the integrity of the investigation. I will post a supporting statement from Corinne Geller (yet again ), she is the spokesperson for the VSA.
She declines to say exactly when police received the results or even what type of forensic evidence was tested. - DATE April 2010 when released to public that Pantera tshirt found on campus was MH's.
http://www.readthehook.com/67960/pantera-find-shirt-15th-street-was-morgan-harringtons
Further at this time, they were not even finished processing DNA samples from MH's remains.
According to Virginia State Police spokesperson Corinne Geller, the forensic testing on the shirt wasn't complete until the last few weeks–- law enforcement did not know the results in January, when the shirt was first publicly reported, she says–-and police are not releasing any details on the condition of the shirt.
Police are still waiting on forensic testing results from Morgan's remains and Anchorage Farm, Geller says, -DATE April 2010
http://www.readthehook.com/67960/pantera-find-shirt-15th-street-was-morgan-harringtons
DNA is not the Holy Grail of any case. It can be weak or strong evidence. DNA at a crime scene or on the deceased does not prove murder. It only shows proximity of two people. Finally, MH could have other DNA on her and it does not come with a date time stamp. So HM could have encountered the perp somewhere else or on another day. It would be great if there were chemical changes that could be traced with it and yield clues.
We won't know unless they charge JM in Morgan's case, so let's just wait and see if LE decides to release further info. Don't mean to be snarky, but seems like it doesn't really matter right now as it's importance is contextual to other evidence gathered and presented at trial.