Just check some reference material. You might not like (or agree with!) what it says, but it should be instructive as to how other people are likely to be using the words (because the people who bother to put such materials together are usually careful to make them reasonably accurate). Also check out mistrial, it's actually a trial that is stopped before there is a result.
A mistrial is a trial that occured, but was fraught with mistakes.
And regardless of the common parlance, or the tendency of usage, disinformation still draws its latin prefix from absence or denial, misinformation draws its latin prefix from errors and problems.
You can slang it up any way you want, but the origin of each word still stands.
