Passage: After the passage of Tehcir Law on 29 May 1915, Armenians left at the two holding centers were deported to Ottoman Syria. Most of the arrested were transferred from Central Prison over Saray Burnu by steamer No. 67 of the Şirket company to the Haydarpaşa train station. After waiting for ten hours, they were sent by special train in the direction of Angora (Ankara) the next day. The entire convoy consisted of 220 Armenians. An Armenian train conductor got a list of names of the deportees. It was handed over to the Armenian Patriarch of Constantinople, Zaven Der Yeghiayan, who immediately tried in vain to save as many deportees as possible. The only foreign ambassador to help him in his efforts was US ambassador Henry Morgenthau. After a train journey of 20 hours, the deportees got off in Sincanköy (near Angora) Tuesday noon. At the station Ibrahim, the director of the Central Prison of Constantinople, did the triage. The deportees were divided into two groups.

Question: What was Ibrahim's job?
director of the Central Prison of Constantinople