MO HB2151

Renames the "Amber Alert System" to the "Amber Alert and Silver Alert System" to include missing endangered persons in addition to abducted children.

Defines "endangered person" as an individual missing under unexplained, involuntary, or suspicious circumstances who is believed to be in danger due to age, health, disability, weather conditions, or being with a potentially dangerous person.

Requires missing person complaints to include the name, address, and phone number of the guardian (if any) of the missing person, and mandates immediate entry into MULES and NCIC systems.

Establishes that law enforcement agencies cannot prevent immediate investigation based on automatic time limitations for missing person cases.

Makes knowingly filing a false report that triggers an alert a class A misdemeanor offense.