One relevant book is The Blue Sense by Lyons and Truzzi, which Amazon suggests can be purchased second-hand for as little as 1 cent. It purports to be a serious study of the role that psychics have played in official police investigations. It’s the sort of book that can serve as a kind of credulity Rorschach test. If you believe, the book seems to provide plenty of ‘cast-iron’ eveidence that psychics have helped in official investigations, sometimes achieving very useful results. If you don’t believe, you can see all the cracks between the pieces of the jigsaw.
So what’s the real answer? First of all, as with anything to do with psychics, the truth is that psychic ability is as real as you want it to be. Believers slice and dice the evidence one way, and skeptics slice and dice it another way. The difference is that the skeptics, while being far from perfect, are at least aware of confirmation bias and other fallacies, especially logical fallacies.
There are certainly psychics who claim that they help solve crimes and work with police officer and detectives. Some even write books about their work. They all have plenty of ‘evidence’ to back up their claims. It’s just that none of it ever amounts to good evidence.
There are some officers and detectives who believe psychics can help, and who have provided statements to this effect. They are very few and far between, but they do exist and the Blue Sense book cited above has details. However, all this proves is that a small number of officers and detectives believe psychics can help. It doesn’t prove that they are correct to believe this. Detectives can be prone to thinking errors.
In some cases, the picture gets a little cloudy. Suppose there is a high-profile case getting lots of media attention. Inevitably, psychics contact the relevant police team and offer their insights and assistance. The police have to investigate and follow-up every tip or lead that they can, so it’s possible they may take a statement from the psychic. Technically, the psychic can then legitimately claim to have helped the police with an investigation. And of course, if they bother to document their own guesses, and if the case is solved and there happens to be any coincidental similarity at all between their guess and reality, they will crow about it from the rooftops.
Some psychics claim that their involvement goes far beyond just giving a statements, and that perhaps a detective working on a case is actually assigned to work with them (work with the psychic). This sounds quite impressive. However, there’s always another view. I have been told by a retired police officer here in the UK that sometimes, during an investigation, the team handling the case want a way to divert any sources of ‘help’ that they regard as noise, interference and nuisance. They can’t really be seen to say ‘Get lost, we think you’re a nutter and you’re wasting our valuable time’. So an easy way out is to say ‘Officer X is your official police liason officer, and he has been appointed to receive your information and handle your calls and correspondence. Please channel all your communications through him’. This gives them an easy way to shunt the psychics off to the side where they can’t get in the way. However, when the psychic brings out his next book, you read ‘The police took my work very seriously. They were so impressed by my amazing insights that they even appointed a detective to work alongside me in the investigation’.