The McCanns claimed that they had abandoned their 3 children under 4 years of age Home Alone whilst they went out for a binge drinking session and a meal at the Tapas Bar. Asked why they had neglected their children the McCanns replied that they believed it was safe to do so. This takes some believing that they believed that. Given their professional status, and given that not one entry on the internet states such conduct is safe.
All too frequently the parents or carer cites an abductor or stranger danger to explain away the disappearance of a child. The McCanns are no different in this respect. They say they are convinced that this is what happened. What special insight do the McCanns possess? None whatsoever. They say they were not present at the crucial time.
This is rather too convenient. The McCanns are claiming that being at the Tapas Bar with their 7 friends provides them with an alibi.
However, this is based upon the assumption that all 3 children were safe and accounted for when the McCanns left the apartment. This is not the case. There is no independent witness to corroborate their version of events.
Therefore, it is legitimate to cast doubts upon the McCanns being innocent witnesses in this mystery.