I would think that proposing a 48 hour time period for anyone to respond or contribute, not just the accused, would be reasonable as I do not believe there is a set time right now. The information(recap) that comix4fun post about holyghost would be a good example of other information not related to the specific transaction gone bad but relevant to the overall behavior.
Remember, some people are not here everyday and we should allow some patience in dealing with issues before adding to the Probation List(unless it is a significant issue), it may not always work out but at least allows for us to be reasonable.