A US Army Staff Sergeant accused of slaughtering 16 Afghan civilians in a night-time shooting spree remembers little about the incident, his lawyer has said.

Wall Street succumbed to more selling today, extending Friday’s selloff in a volatile session that saw the Dow Jones industrials drop more than 300 points, rebound and then close down more than 230.

Bargain hunting lifted US tech stocks moderately higher today, but the overall market fell on news that yet another company, Knight Trading, was being investigated by the government.