Keela can alert to blood that forensics cannot find. Blood being recovered under a tile is very telling. You can't clean up there.
On scent of success: sniffer dog Keela earns more than her Chief Constable
HER detective work is unsurpassed, her dedication to duty during some of Britain’s most challenging murder cases unfailing.
Keela, a 16-month-old springer spaniel, has become such an asset to South Yorkshire Police that she now earns more than the chief constable.
Her sense of smell, so keen that she can sniff traces of blood on weapons that have been scrubbed after attacks, has her so much in demand by forces up and down the country that she is hired out at £530 a day, plus expenses.
The Times December 30, 2005
https://www.thetimes.co.uk/article/on-scent-of-success-sniffer-dog-keela-earns-more-than-her-chief-constable-2lwgph6kk9bService Information 1 August 2007
By Joao Direito, Inspector
Recovery of possible trace evidence
I bring to your attention in accordance with instructions received, that today, around 20h00, LPC Assistant Specialists Fernando Viegas and Lino Rodrigues, after seeing recorded images relating to the canine inspection conducted on 31 July 2007 in apartment 5A of the Ocean Club, duly explained in an official statement in the case file, they proceeded to collect [recover] the floor tiles where the dogs used in the activity indicated [alerted to] the possible existence of blood traces along with the position of a cadaver in that location.
Those tiles were lifted from the floor, in a way to preserve the possible traces intact for them to be subjected to examination by an authorised laboratory.
The activity was filmed in a way to illustrate the manner in which the uplifting was performed and the tools used, allowing that the experts would have a better understanding of all the circumstances inherent in the removal action. This resulted in the recordings of two video cassettes (Mini DV) which are attached.
The LPC officers are going to produce the official report.
That is all I have to advise.
Inspector, Joao Direito.
http://www.mccannpjfiles.co.uk/PJ/BLOOD.htm