I agree with much of what you say but don’t see the Martindale connection. Martindale was just an occasional footballer but made his living away from the game and was convicted of drug offences and money laundering. It looks like, on his release from prison, he turned his back on his criminal past but it was something like 6 years after his release before he obtained a paid position in football having regained the trust of some people but not all, especially Scottish football’s governing body who took another five years before they were willing to accept he was “fit and proper” to be an official.
Garritty was convicted of robbery with violence. I don’t see anything - though I might be wrong - of there being any conviction for possession or dealing.
Prior to his imprisonment, Garritty made his living from sport, Martindale didn’t. Garritty is looking to be re-employed as a sportsman straight away. Martindale had to wait many years and then only in the capacity of an official.
Yes, Martindale proves criminals can be rehabilitated and all credit to him for what he has achieved. Those that know recognise that Garritty has had many many “second chances” and so far taken none of them. The last one was being released on licence last year which didn’t last long. Why should any club be expected to give him another chance? Let him do a Martindale - get a job, prove you’ve changed, then someone might think he still has a value within speedway.