MO HB461

Adds refusal to submit to a chemical test for alcohol content as a third category of tampering with physical evidence under section 575.100, alongside altering/destroying evidence and making false documents.

Makes tampering with physical evidence a class D felony if it impairs prosecution or defense of a felony; otherwise it is a class A misdemeanor.

Includes refusal to submit to chemical testing under the definition of "intoxication-related traffic offense" in section 577.023 for purposes of determining prior, persistent, aggravated, and chronic offender status.

Allows courts to consider continuous alcohol monitoring or breath alcohol testing as a probation condition for intoxication-related traffic offenses, with offenders potentially bearing associated costs.

Establishes mandatory minimum imprisonment periods for repeat DUI offenders: 10 days for prior offenders, 30 days for persistent offenders, 60 days for aggravated offenders, and 2 years for chronic offenders.