And the most important part of the crime scene was tampered with before the police arrived. That red flag is doing some whooshing 
In his book Mr Amaral asserts "An inspector is sent to the scene immediately to establish the initial facts. A forensic expert assigned to security of the premises will join him.
All precautions are taken to preserve possible clues and elements of evidence."But that is not what actually had happened.
Subject: Despatch of Report on the Searches carried out in P da L
http://www.mccannpjfiles.co.uk/PJ/GNR_SNIFFER.htm4. The commander of the Lagos post,
Sargeant Antonio Henrique Conceicao Duarte immediately left for the site the girl had disappeared from, telling the officers to preserve the apartment, and arrived at 23.50 at the OC, where he was informed about the situation together with the patrol officers and where he saw that searches had already taken place, carried out by the girl’s father and locals, but without any results.
This is confirmed in Sgt Duarte's witness statement
http://www.mccannpjfiles.co.uk/PJ/ANTONIO_DUARTE.htmThe witness, from the description and supposed seriousness of the facts related, ordered the immediate preservation of the scene, and said he would go to the site and communicate the facts to the PJ (this was done from the Post, he does not remember which officer did this but thinks it was Officer Patricio).
Sgt Duarte arrived at the Ocean Club at 23.50 and when PJ Deputy Specialist João Franciso Páscoa Luis Trigo Barreiras arrived 00.50 the crime scene was still unsecured despite the sergeant who had given the order to secure it being in attendance for an hour.
When they arrived at the scene, which they immediately identified due to the presence of GNR officers, as well as quite a lot of people who were walking around the street searching for the child, they immediately went to the apartment in question, where they found several people, including some GNR officers, as well as the head of the Lagos GNR station.
He states that the people inside the apartment and close to it, entered and left the building and circulated in the whole apartment, completely freely, in other words, without there being any restriction or care in preserving the scene. http://www.mccannpjfiles.co.uk/PJ/JOAO_BARREIRAS.htmI have written the above precis from the full account of the lack of professionalism in securing the crime scene from here
https://madeleinemccannthetruth.wordpress.com/2011/06/28/preserving-that-crime-scene/ which goes on to discuss the further contamination of the scene while under police control.
Including a link to the Daily Mail article claiming that the cleaners were allowed to take Madeleine's bedding to the laundry.
To say the crime scene was mismanaged is an understatement considering the destroyed forensic evidence which could have shown the presence of an intruder had it survived.
To blame Madeleine McCann's parents for that situation is so far off the mark it is absurd.