The Murder of Max Sinclair

A Private Investigator, neck deep in a case. He was found in his office late last night, the walls soaked with warm blood and ill intent.
The other cops see no sign of foul play, just a man at the end of his tether. But you're not like the other cops: you're detectives. Gritty, hard boiled, and not so quick to take things at face value.
What really happened here? what did Max discover? How - and why - did he die? We need you to find out.