Kate McCann, in her book claims she asked the police May 3rd about sedation. Here is what Gerry McCann had to say on the subject when he was made an official suspect (arguido) into the disappearance of his daughter.
When questioned if the twins woke while the apartment was being searched, he replies negatively. When they were taken to another apartment he does not know if they woke as he did not take them. When asked, he says that this was not normal, and can find no reason for it happening. He still thought at this moment that the twins might have been drugged by the possible abductor, even if he only mentioned this to the Police several days later.
http://mccannpjfiles.co.uk/PJ/GERRY-MCCANN-ARGUIDO.htm
When questioned if the twins woke while the apartment was being searched, he replies negatively. When they were taken to another apartment he does not know if they woke as he did not take them. When asked, he says that this was not normal, and can find no reason for it happening. He still thought at this moment that the twins might have been drugged by the possible abductor, even if he only mentioned this to the Police several days later.
http://mccannpjfiles.co.uk/PJ/GERRY-MCCANN-ARGUIDO.htm