Levi Paschal, 34 of Clarence Avenue, SW4 was found guilty of murdering 38-year-old Lee Casey following the conclusion of a trial at the Old Bailey on Thursday, 28 January.
He was also convicted of the robbery and causing grievous bodily harm with intent to a 48-year-old male victim.
His partner, Clementine Jones, 32 , also of Clarence Avenue, SW4 was also found guilty of the robbery and causing GBH with intent.
Both will be sentenced at the same court on Friday, 5 February.