I do not recognise that to be the case.
Dogs are certain to have false positives and false negatives.
Of course if they lose their 'knack' then they need to be retired.
But no one expects dogs to be 100%.
I would be interested to see your cite for Eddie and Keel getting top marks at the body farm.
Eddie and Keela's record is largely unknown except from non- independent sources.
Certainly they alerted repeatedly when no forensic evidence was present even in this case and bad done so regularly. These unknowns create an uncertainty about false positives.
Have you got any proof of false alerts? According to Grime Eddie has none and the dogs passing with flying colours at FBI body farm comes from somebody close to Grime. The FBI used these dogs. The FBI wanted these dogs because they were outstanding at their job.
Vol IX p. 2481
FALSE ALERTS
'False' positives are always a possibility; to date Eddie has not so indicated
operationally or in training. In six years of operational deployment in over 200
criminal case searches the dog has never alerted to meat based and
specifically pork foodstuffs designed for human consumption. Similarly the
dog has never alerted to 'road kill', that is any other dead animal.
Attracta dog helps FBI to track killerPublished: August 22, 2006
The sniffer dog that helped detectives jail evil killer Trevor Hamilton has just returned from assisting the FBI with a murder probe in America.
Six-year-old English springer spaniel Eddie’s career took off internationally shortly after he returned to Ulster for a third time to help in the hunt for missing Arlene Arkinson.
Eddie helped police nail Hamilton after the victim-recovery dog found blood from Attracta Harron (63) on a mat from Hamilton’s burnt-out Hyundai car.
He burned it the day that he murdered the retired librarian.
Eddie found her body in a shallow grave in April 2003.
Martin Grime, Eddie’s handler at the Dog Unit attached to South Yorkshire Police Station, today told how he has returned to Tyrone to search for Arlene (15).
She went missing after leaving a disco in Bundoran, Co Donegal, on August 13 1994.
Police have recently been concentrating their search in her native Castlederg in Tyrone, where it is thought she was murdered.
Mr Grime said today: “We were over earlier this year and three times in total since the Attracta Harron case.
“With the Attracta investigation we came over for a week and on the last day, before we came back to the UK, we decided we would search the car. The stuff Eddie found was then taken away for forensic examination.
“Then when a search area was identified Eddie found the body as well. As far as the Arlene case goes, however, there has been nothing to date.”
Eddie has just returned from the US where he has been helping the FBI in a murder case.
Mr Grime said: “Dogs like Eddie are very, very good at what they do and he has lots of operational experience.
“I do some training with him every day.”
Hamilton (23) received Ulster’s longest prison sentence after he was jailed for life for the murder of Mrs Harron.
http://www.goodnewsblog.com/2006/08/22/attracta-dog-helps-fbi-to-track-killer