Taken from the '
Terms & Conditions
' ...
We are under no obligation to actively monitor and/or moderate User Content. We do however undertake very limited monitoring detailed below.
Anti-Cheat Technologies
We may use anti-cheat technologies in relation to the Jagex Products. When you connect online to a game server, these technologies may activate and monitor your game play, the files on your computer associated with the Jagex Product or that otherwise access our servers, and your computer's memory, purely for the purposes of detecting and preventing cheating.
If any of these anti-cheat technologies detect cheating, we may collect relevant information necessary for our investigation and enforcement purposes, including your Account name, details about the unauthorized third party program and the Jagex Product files modification detected, and the time and date it was detected. We also may terminate these Terms, your access to the Jagex Products, and your Jagex Account if we determine you have been cheating.
The day a player receives a ban/mute ...
The moment you, a player, do receive a ban/mute Jagex/JMods ended an investigation that was tight connected to one of your account(s) with a conclusive end-result that action is justified based upon the evidence found on your account(s).
How long that investigation did take place, Jagex/JMods do not elaborate, at leats it did take place prior to the band/mute.