Jad Karadin is a witcher of the Cat School who had decided to retire from the profession and live out his life as a nobleman in Novigrad. He married a woman and adopted her two children. Karadin formerly led a band of assassins, of which Selyse, Lund, Hammond and Vienne were members. Whether there are more former members alive at the time Karadin is encountered remains unknown.
The witcher Lambert, whom Geralt of Rivia encounters shortly after taking on a contract for an ekimmara issued by one of Lund´s guardsmen, has a personal interest in finding Karadin since he has credible information that the now-disbanded gang had killed Aiden. Aiden, a witcher of the Cat School, was a good friend of Lambert who now tries to find Karadin to exact revenge for the murder of the fellow witcher. Lambert eventually manages to track Karadin down, with Geralt's assistance.
It is revealed that Karadin retired from being both witcher and assassin and lives in Novigrad as a merchant and has his own family. He tells them that Aiden's death was an accident and that he really regrets it.
However, this version of the story stays vague and can be rebuted due to various reasons.
1.) Lambert worked a considerable amount of time side by side with Aiden, which lends his evaluation of Aiden as a professional witcher the most credibility. According to this, Aiden would have never left a contract unfulfilled or would have tried to cheat his clients.
2.) The sharpshooter Vienne and former member of Karadin´s gang states that the gang´s contracts consisted for a great deal out of killings, making Karadin´s version even more unbelievable.
3.) Lambert has information that Karadin himself dealt the finishing blow to Aiden and not Vienne, like the cat witcher claims. This means that one of the two versions is wrong, since Karadin´s version of events contradicts both Vienne´s and Lambert´s version.
4.) Lambert claims to have solid proof that Karadin, under his new pseudonym, is now active in the slave trade which can be taken as confirmed due to the up-to-dateness of when Lambert gathered this information.
5.) Karadin wrote a letter to Hammond, a former member of the gang, claiming to take no part in the slave trade, however, he mentions other possible traders in Novigrad. Since Karadin almost exlucively took contracts on killings shortly before Aiden died, it raises suspicion how Karadin can possibly know slave traders if he gave up his life as a criminal immediately after the death of Aiden. This implies that Karadin is active in the trade or at least has strong connections to other traders in Novigrad, making his version less credible.
Due to these facts, it is relatively clear that Karadin´s version is not how the death of Aiden really took place and Lambert´s and Vienne´s information tends to be much more credible.
In the end, Geralt of Rivia must decide whether he helps Lambert follow through with his revenge or if he does not want to back Lambert in his decision, sparing Karadin despite the murder of Aiden. If Geralt decides to help Lambert, a fight will ensue in which Karadin will meet his end. If Geralt chooses to take no part in Lambert´s revenge, he tells Lambert that "he may do with Karadin as he wishes", but he will take no part in it.
Associated quests Edit
- In the Polish edition of the game, his name is Bertram Tauler, as a homage to a character from Andrzej Sapkowski's "Narrenturm" trilogy, Berengar Tauler.