It's interesting to read the post above and see how this really happened. 11 years ago, pre-conviction. To be honest, this should make it very simple to wipe this athlete's records. It's an old record, the person is known to be trans, a murderer, and their record is enough to that it's not been beaten in 11 years.
But ParkRun can do nothing going forward other than to allow self-ID. You literally tick a box on registration. It is a grassroots, volunteer-led organization with millions of runners signed up. They can't inspect birth certificates, conduct hormone tests or whatever else elite sport can do.
It's shit when media stir up trans controversy unnecessarily, though in this case, I feel that ParkRun could have avoided it by wiping this record years ago.