I was a manager with an employee who was actively trying to defraud the company with a tool <x> he had developed (claiming he had developed it before being hire

I was a manager with an employee who was actively trying to defraud the company with a tool <x> he had developed (claiming he had developed it before being hired) while moonlighting. I instituted a strict butts-on-seats policy, planned to remove technology <x>, forced process to ensure source control, code review and deployment by other team members, etc. Being a manager isn’t all glamour. There are many people who are trying to scheme, lie and cheat their way to fortune at your company’s expense, and if the manager lets them.... bad news for the manager.