Fairly soon after returning to Estonia from the Kirov oblast in 1948, Tuldava-Haman informed the KGB of Kalju Oja’s anti-Soviet activities. Oja was his long time friend who had just been released from labour camp. Recognizing Tuldava-Haman as a loyal informant, the KGB formally opened an operational dossier named ‘Trotskist’, archiving Tuldava-Haman’s activities. Oja was arrested the following summer and sent to exile in Krasnojarski krai.
In 1949 Tuldava-Haman commenced teaching Russian and Estonian at the Pelgulinna 17th highschool in Tallinn. Even though he had not been officially relieved of his sentence to exile in Kirov oblast, he was granted permission to work in the capital and live in the apartment on Gonsiori street of General Richard Tomberg who had been arrested. (These apartments situated in the ‘Generals’ House’ were meant for high military officers, for the privileged of society both before and after the Soviet occupation.) It was obvious this special treatment was afforded to Tuldava-Haman by the MGB.
His handlers in Tallinn were from the MGB 2N department to which agent ‘Voronin’ presented his information. In one submission he informed the KGB that his friend Alfred Saul was in contact with individuals who, it was said, were in contact with Estonian ‘emigrants’ who were attempting to form an underground government. (Pikemalt Eesti Elu 16. nov. 2018 paberlehes)