During the 1990s and early 2000s, Roy Meadow was an expert witness in several murder cases involving MSbP/FII. Meadow was knighted for his work for child protection, though later, his reputation, and consequently the credibility of MSbP, became damaged when several convictions of child killing, in which he acted as an expert witness, were overturned. The mothers in those cases were wrongly convicted of murdering two or more of their children, and had already been imprisoned for up to six years.