For a kick-off, writing in this manner makes it really hard to read, so frankly I can't be bothered to try and follow all the nuances.
However if you are asking a legal question, it is most unlikely that he will be dismissed and it is more likely that he will end up with a Written Warning regarding his conduct, following an investigation during which he will be interviewed. The letter should state what the required standards are, and will be probably terminate in a phrase along the lines of 'failure to maintain a suitable level of conduct in future may lead to further disciplinary measures that may ultimately lead to your dismissal'.