November 2017: Star Tribune publishes a five-part series documenting breakdowns in the investigation and prosecution of criminal abuse in senior care homes.

Nov. 16: Sen. Karin Housley, R-South St. Paul, announces legislation to toughen state oversight of senior homes.

Dec. 1: Gov. Mark Dayton appoints a working group of families and elder advocates to recommend reforms.

Dec. 20: Health commissioner resigns.

Jan. 30: Dayton’s reform work group calls for “dramatic and immediate’’ reforms.

March 2: State announces it has virtually eliminated a huge backlog of unresolved maltreatment reports.

March 6: Minnesota legislative auditor finds failed management in state’s oversight of senior homes.

March 13: Dayton unveils a series of reforms, including tougher penalties for abuse and tighter regulation of assisted-living facilities.

March 15: Republican senators unveil a series of reforms.