ISLAMABAD — The confessed killer of a liberal Pakistani governor pleaded guilty Monday to a murder he said was justified under Islam, while outside the court supporters bearing flowers and cards wished him a happy Valentine's Day. Mumtaz Qadri shot dead Punjab province Gov. Salman Taseer in January while serving as one of his bodyguards. Qadri has told authorities he killed Taseer because the governor spoke out against harsh Pakistani blasphemy laws that impose the death sentence for insulting Islam. The assassination horrified Pakistan's relatively small liberal...