Missouri: Can St. Louis Prosecuting Attorney face a recall?

Following the Ferguson Grand Jury decision last week, here's an article on the possibility of recalling St. Louis County Prosecuting Attorney Bob McCulloch. The political science professor quoted in the article seems to feel that recalls infrequently work and are used for kicking people out for corruption. I'd hope that the thousands of posts on this blog serve as a definitive refutation of the second part of that statement (and, if he means that once on the ballot they fail, the first part as well). That said, the recall would be a big challenge to get on the ballot. Petitioners would need 104,000 valid signatures to get the recall on the ballot.