CORD leader Raila Odinga has called for a thorough and speedy investigation into the killing of controversial businessman Jacob Juma, saying that the police must make sure that the culprits are brought to book. Juma was shot dead by unknown people while driving past Lenana School Thursday night, police said. His car had ten bullet holes when it was found with engine running shortly after the 9.30 pm incident and door flung. It gave an indication the killers went to confirm he had died. The incident happened along Ngong Road near the Southern by pass and past Lenana School.