PHNOM PENH, Cambodia — Tens of thousands of Cambodians marched Sunday in the funeral procession for a leading government critic who was fatally shot in an attack that raised suspicion of a political conspiracy. A farm worker who was caught red-handed told police he killed Kem Ley, 45, over a $3,000 loan. However, the suspect's wife said the family was too poor to lend so much money. Although there were no overt political slogans during the procession, the huge crowds reflected the...