In 2323, Keeve left Jekko in charge of his family's holdings on Bajor after he became frustrated with the continuing takeover by Cardassians and the Chamber of Ministers' weakness and left for Valo II.
In 2328, Jekko was still on Bajor and Keeve had him show Alynna Nechayev and Gwen Jones the weapons that the Cardassians had brought to Bajor. Jekko took them into the Cardassian enclave near Korto using plans he obtained from his old friend Darrah Mace. Unfortunately, they were discovered by a guard and Jekko was forced to sacrifice himself so that the two Starfleet officers could escape. (TLE - Terok Nor novel: Day of the Vipers)