What a completely bizarre case.
The 26yo man who was arrested has now been bailed without charge as far as the bones are concerned (though he was charged with PWITS), which suggests to me that if there is to be any charge at all it will be more in the order of unlawful disposal of human remains than murder or manslaughter (or nothing at all, of course). I'm only speculating though.
Man arrested in connection with discovery of human remains in Sudbury bailed
I must say, when I read the original story, with the remains being skeletal, partial, lacking any obvious CoD, the DNA not being in the UK DNADB, and having just appeared out of nowhere even though they must have been stored elsewhere previously (but where? and how did they decompose unobtrusively?) what it made me think of was the partial skeletons they give medical students.
It would be interesting (to my warped brain) to know exactly what bones they do and don't have. If all or most of the bones of only one leg were recovered, that would be what my money's on actually. [Edit to add that Sudbury comes under the West Suffolk NHS Foundation Trust, which is part of the Cambridge Uni graduate medical programme.] But not if bones were recovered from
both legs of
one person, because that's not how osteology samples are generally provided.
Probably a slightly left field way of looking at things, though it wouldn't be the first time something like this has happened. Weird case, though. I'm proper intrigued now.
JMO