Counterterrorism police on Saturday were questioning a friend of Michael Adebolajo, one of two suspects in the savage killing of a British soldier. The friend, Abu Nusaybah, was arrested immediately after he gave a television interview telling his story about how Adebolajo came to be radicalized. In his interview, Nusaybah said Adebolajo became withdrawn after returning from a visit to study in Kenya, where he claimed he had been physically and sexually abused in detention. Nusaybah also alleged that the U.K.'s security services tried to recruit Adebolajo after he returned to Britain.