A second officer has been arrested in connection with the death of a teacher in custody in the Kenyan capital Nairobi, the police watchdog said Friday, a case that has sparked nationwide outrage.Another officer from the same Nairobi station, Constable James Mukhwana, appeared in court earlier in a case under the charge of the IPOA. The watchdog asked for three weeks to complete its investigation, telling the court Mukhwana was present on the night Ojwang was processed by officers.