 De Haan had come to Palestine as an ardent Zionist, but he had become increasingly critical of the Zionist organizations as he favored a negotiated solution to the struggle between Jews and Arabs.The murder shocked Palestine and Europe, and the British authorities offered a reward for information that would lead to the arrest of the assassin, but the killer was not caught.In an interview for Israeli television 60 years later, Tehomi confessed to killing de Haan to Israeli journalists Shlomo Nakdimon and Shaul Mayzlish.