Only if a thorough and properly forensic examination took place. Remembering the photos of the lady carrying out the process does not inspire me to believe that it did.
Photos 21 to 23: Displays of the the bedroom with two single beds of the target apartment.
Then began the detailed observation of the apartment interior ending with the search and recovery of forensic trace material relevant to the present examination.
Initially the search began for latent shoe-prints it being verified that dozens existed on the floor, in the various rooms of the apartment, which invalidated the attempt of identifying those of the perpetrator.
Also, innumerable tracks [footprints] that were taken to be canine in origin mixed with red- and white-coloured chemical products, as used to see fingerprints, and an enormous quantity of hairs probably of animal (dog) origin that made it difficult to find possible traces, especially in the bedroom of two single beds and two children's cots from
where the minor disappeared, and next to the aluminium window/door leading from inside the living room to the exterior area behind the apartment.
Photos 24 and 25: Detail of the red-coloured chemical existing in the bedroom from where the minor disappeared.
http://www.mccannpjfiles.co.uk/PJ/5A_FORENSIC_4_5_7.htmThe crime scene was botched
The forensics were botched.
Resulting in the lack of evidence at the crime scene for which there are those who point the finger of blame at the victims.
Quite clearly police incompetence and the initial incompetence of those tasked with harvesting forensic traces are revealed as being very much the cause and it is in that direction that criticism if any should properly be directed.