If the beating charges turn out to be true it will hurt the McCann investigation, according to Roy Ramm, former commander of special investigations at Scotland Yard. Ramm told ABC News: "This is not something you would expect to find in the U.K. When someone has allegations of falsifying evidence and beating a witness and these are very serious allegations -- it does not bode well for the case."
"People have to have confidence in the person leading the investigation," he added. "Otherwise the chances of a satisfactory outcome are jeopardized."
In a book entitled "The Star of Joana," former Portuguese detective Paulo Pereira Cristovão alleges how police took too long in organizing a search for the little girl.
Silva thinks his wife's beating was a simple matter of the police needing to find a suspect as well as maintaining a safe image for tourists who come to the Algarve.
He calls the accusations against her ridiculous. "She was a great mother," said Silva. "She never even hit Joana, not once even when our little girl insulted her."
Joana was not Silva's biological daughter but he insists she was still his daughter. "First they took my daughter, now the police have taken my love, my lifelong partner."