Keb was a 24th century Trill man who, by the 2360s decade, had been joined to the deranged Dalor symbiont.
Biography[]
After the joined Keb Dalor committed a number of crimes, the penal colony at Tantalus VII had the Trill in custody, and the scientists there were researching a way to separate the two so that Dalor could be prosecuted for his crimes, without further punitive action of the unwitting Keb.
In the year 2369, Dalor had himself separated from Keb, effectively murdering the host. (TNG comic: "A House Divided")