A Portland man arrested after allegedly stabbing another male in what he says was self-defence in Nantucket, Massachusetts on Tuesday, has been released on US$2,500 bail, according to US media reports. The Jamaican, 39-year-old Kemar Downer, appeared in the Nantucket District Court on Wednesday morning on two charges of assault and battery with a dangerous weapon, causing serious bodily injury. a screengrab from surveillance video showing the stab victim approaching and hitting Downer from behind before fleeing after being stabbed (Nantucket Current) According to the Nantucket Current, the altercation, in which Downer has claimed self-defence resulted in a man being transported to a mainland hospital by Medflight helicopter.