As the Witness, when you use your kill button on someone, you will know if they killed in the last X seconds or not. (X depends on the settings)

  • Ability Cooldown
    • Set the amount of time Witnesses need to wait to use their ability
  • Max Time after killing where killer appears red
    • Set the amount of time after a kill where the killer will appear red to the Witness

From: ToUR (Detective) & Coding: Gurge44