I think that there was some question at the time,regarding the forensic evidence, but as was stated , the brits knew of this and the British Ambassador pushed the Spanish to complete and release the body .Thereby forestalling any investigation into the real cause of death.(which would have revealed death by poisoning and not drowning)
Not only had the body been in the morgue but in a torpedo tube and then in the sea...hardly in a state to be easily examined.
I remember seeing "The Man who Never Was" and then learning later his real identity.
The average person in those day knew nothing about forensic medicine, and it is only through TV programmes and crime books that we do today.In fact looking back, my first knowledge was of Sir Bernard Spilsbury a home office Pathologist who in court, demonstrated(By nearly drowning his secretary) how "The Brides in the Bath" murderer committed the deed
Spring