Good points TD, I do believe corruption in police as well as in newspapers played a role how some events always remained a mystery.

Remember Lingle?

Alfred "Jake" Lingle (July 2, 1891 – June 9, 1930) was an American reporter for the Chicago Tribune. He was shot dead gangland-style in the underpass leading to the Illinois Central Randolph Street station on the afternoon on June 9, 1930, as dozens of people watched.[1][2] The man convicted of the murder was mob associate Leo Vincent Brothers.

Lingle was initially lionized as a martyred journalist, but it was eventually revealed that he was involved in racketeering with the Capone organization and that his death had more to do with his own criminal activities than his journalism.[1][3]