Only Wedge remained convinced that Tycho was not an Imperial agent. After his escape from Imperial custody, many people had misgivings about him. He was sent to Lusankya, a facility known for turning out brainwashed Imperial sleeper agents. He had been captured by Imperial forces while on a covert scouting mission to Imperial Center a year before the events in 'The Krytos Trap'. Tycho Celchu had been under a lot of scrutiny since the beginning of the 'X-Wing' series, and a lot of circumstantial evidence piled up against him during the capture of Imperial Center and Corran's presumed death. As a result, the virus did not do as much damage as Isard had hoped it would, and it never managed to escape Imperial Center. Isard had been using the water supply to spread the virus, so destroying the reservoir drastically slowed the spread of the virus. The Rogues helped take Coruscant a week before Isard wanted them to, and their strategy involved destroying a water reservoir. Kirtan Loor, in 'Wedge's Gamble', was charged with preventing the Rebels from taking Coruscant before it had been properly infected. This was meant to cause tension between the humans in the Rebel Alliance and their non-human allies, while simultaneously bankrupting the Rebel Alliance by forcing them to buy large amounts of bacta to fight the spread of the virus. The virus only affected certain non-human species, and could be cured by bacta.

Isard planned to let the Rebel Alliance take Coruscant, but only after she had infected a significant population with her virus.

Many non-humans disliked the Empire because it was a human-centric government. Derricote was unable to create a virus that came close enough to Isard's specifications, and he was put into Lusankya as punishment. He was also a keen scientist, and was brought to Imperial Center (Coruscant) to create the virus. Derricote formerly ran the base on Borleias that the Rogues took in 'Rogue Squadron'. Isard had the Krytos virus created by General Derricote.

X wing the krytos trap