A jury will not hear key pieces of defence evidence that could detract from the theory that former West Vancouver students Atif Rafay and Sebastian Burns killed Rafay's parents and sister in their Bellevue home near Seattle in 1994.Their trial on charges of aggravated first-degree murder begins Monday in Seattle.King County Superior Court Judge Charles Mertel ruled this week that the defence may not introduce testimony from a criminal psychologist who would have testified that innocent people sometimes make false confessions.His evidence would have helped the defence show that the two could have made false confessions to RCMP undercover agents...