Coincidence? The strange unsolved murder of a 17 yr old girl that was found on property belonging to Queen Elizabeth

[harumph]

8. "Attempts to get a useable DNA profile..." wtf does that mean?

To me at least the following sentence raises a lot of questions:
"Attempts to get a useable DNA profile for Miss Dmitrijeva from tooth and muscle samples were inconclusive."

Do they mean that the samples were contaminated? In what sense is the term "useable" being used?

DNA profiling has really come along in the last 10 - 15 years, and it makes me wonder just why it was so difficult in this case.

Apparently she was only dead a few months before they found her so it's not like we're looking at neolithic remains.

I'm tempted to wonder whether some attempts were made by the forensic staff to botch it deliberately.

But of course shit happens everyday like security cameras malfunctioning and sleeping guards - you know, just coincidence.