It's misleading because a single murder in this case is not statistically significant, but phrasing it using probabilistic terminology (i.e. percentages) obscur

It's misleading because a single murder in this case is not statistically significant, but phrasing it using probabilistic terminology (i.e. percentages) obscures that fact and implies that you have enough data for the probabilistic language to be relevant. Choosing to use percentages when there is a countable or small amount of data is typically misleading, even though it is "technically" true. In fact, a misleading statement is almost always something that is technically a fact.