What should Overwatch investigators look for when they're reviewing a case?

No Cheaters Allowed: How to Be a Good Overwatch Investigator

Overwatch, CS:GO's crowd-sourced anti-griefing and cheating detection system, is often taken for granted. While some believe the service does nothing to rid the game of hackers or that Overwatch investigators should get some sort of reward for their efforts, Valve's creation...
Two of the world's best Overwatch players have been accused of using aimbots to improve their in-game performance.

Surefour and Taimou Hit with Aimbot Allegations

Overwatch has not even hit its official release yet and two of the top players on the professional scene have been leveled with hasty accusations of using third-party software to boost their in-game performances.