An arrest without a warrant by a law enforcement officer, including a uniformed member of the state highway patrol, for a violation of section 577.010 or 577.012 is lawful whenever the arresting officer has reasonable grounds to believe that the person to be arrested has violated the section, whether or not the violation occurred in the presence of the arresting officer.
Mo. Rev. Stat. § 544.218
Arrest without warrant, lawful, when
Effective: 01 Jan 2017, see footnote; (L. 1982 S.B. 513, A.L. 1996 H.B. 1169 & 1271 merged with S.B. 722, A.L. 2010 H.B. 1695, et al., A.L. 2014 S.B. 491)
Official source: Missouri Revisor of Statutes. Reproduced from public-domain Missouri statutes; confirm against the official source for the current text. Not legal advice.