Mo. Rev. Stat. § 544.120: Attempted escape of felon, officers to pursue — arrest.

Whenever any felony shall be committed, and the offender attempt to escape, public notice thereof shall be immediately given, at all places near where the same was committed, and pursuit shall be forthwith made after the offender by sheriffs, coroners and constables, and all others who shall be thereto required by any such officers; and the offender may be arrested by any such officer or his assistants without warrant.