[2011 May] At least half of all parents tried over shaken baby syndrome have been wrongly convicted, expert warns   DI Welsh, in a public lecture, talked disparagingly about prosecution cases that had failed largely due to expert defence witnesses. He described a way of eliminating them from criminal and possibly family court trials, thus precluding alternative views being presented. He believed they confused the jury and possibly the judges with the complexity of science. DI Welsh’s solutions included ‘questioning everything – qualifications, employment history, testimony, research papers presented by these experts, go to their bodies to see if we can turn up anything’. ...‘It proved in my mind that the police have set out to remove me and two other neuropathologists who share the same view from the courts because we have stood in the way of their campaign to improve conviction rates. If an expert witness bases an opinion on reasonable scientific ground, even if the opinion is a minority one, it should not be excluded. ...‘The experience has made me feel like a whistleblower – on the one hand challenging all those who prefer the comfort of old mainstream opinion, and on the other struggling for my professional life.’