Of all the potentially bad evidence presented at trial, a very large universe indeed, none is worse, less credible, less worthy of belief than the jailhouse snitch. As Radley Balko notes:
The whole concept of jailhouse informants defies credulity. The very idea that people regularly confess to crimes that could put them in prison for decades or possibly even get them executed to someone they just met in a jail cell and have known for all of a few hours is and has always been preposterous. Not to mention the fact that these are people whose word prosecutors wouldn’t trust under just about any other circumstance.
To say that prosecutors wouldn’t trust them is an understatement. These are the lowest of the low, the least credible of all, and to ask a prosecutor to believe them otherwise would bring about hysterical laughter. Except when they bring something a prosecutor needs, at which point they magically turn into the most believable guy ever. Continue reading
