The only way of changing his attitude towards Shepard is meeting with Liara T’Soni in the nearby Apollo cafA.
In the end Liara will suggest to met with Volus regarding recruiting new mercenaries.
Afterwards you’ve got the option to leave the Citadel and head on board the Normandy.
fire up the galaxy map and head to theKrogan DMZ(it becomes available after completingPriority: Sur’Kesh).
After reaching the destination (Aralakh system), fly to the neighbouring system ofDranek.
it’s crucial that you take interest in the planet ofRothla(screen above).
Fly to the marked planet and start scanning it (hold down the right mouse button).
Afterwards you might return to the quest giver to give him the report.
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