St. Louis Police Chief Sam Dotson says he is frustrated and disappointed after learning a black officer received a racist letter through interdepartmental mail. Dotson has ordered internal and criminal investigations after learning about the letter last week. The Chief believes the action could be considered a hate crime. The letter was sent to an officer in the department's south patrol division. The St. Louis Post-Dispatch reports that the typed letter arrived about a month ago and was addressed to the officer. It included several profanities and a racial epithet. The sender said the officer was not wanted in the station and threatened that police would not to respond if the officer called for help. It also included a death threat. Chief Dotson says he has taken steps to ensure the officer's safety, but did not elaborate on those steps.