Boston Blotter: Murder-Suicide in Upton

-- Upton police found the body of a couple, who they believe were killed in a murder-suicide. Dawn Armstrong, 37, and Thomas Lizotte, 42, of Millville, who were said to be lovers in an "on-and-off relationship," were found stabbed to death in Armstrong's Upton home. Police believe that Lizotte killed Armstrong before killing himself. [WBZTV]

-- A man in his 20s was stabbed to death late Saturday night in South Boston, police say. The identity of the victim has not been announced, and no further details were available in the case. [BPDNews]

-- Boston police have arrested Darius Washington, 18, of Roxbury, in the May 17th murder of Sheikh Kakay (also known as Cheickoumar Kake), 22, of Roxbury. [BPDNews]

-- An Arlington man was robbed in North Cambridge by men dressed like ninjas. [Cambridge Chronicle]

All charges alleged until proven under law.