Even more reason to believe he was turned by Drakul.
Here are the realistic options I believe.
1. He was turned to the Black Court
2. He's alive and working with Drakul (Black Council?)
3. He was sent to the Outside. Harry asked what happened to people dragged there by those creatures and Eb's response was "We don't know".
4. He killed him.
5. Drakul has abucted him, and has bent him to his will via torture, mental manipulation, or something along those lines. Those methods lead to insanity. I don't think Langry himself could stand against Drakul's will for long. Drakul is just at a whole new level of power.
Whatever the case, it's bad. I don't see Chandler being alive unless he's a bad guy, or driven insane from mind magic
I tend more towards the Chandler was abducted scenario, Yet I can also envision a way for him to be alive and still on team «evil bastard».
The way I see it is that Drakul could have done a few things when he sent Chandler away.
1. Chandler was already on his team: he sent him to safety.(Team evil all along scenario)
2 Drakul sent to a holding place for his posterior motive.
a. Poor Chandler might be turned,
b. Simply killed after Drakul has gotten what he wanted from him
c. convinced to join Team evil of his own volition
d. tortured into insanity (first possibility where he could still be alive and not evil but damaged)
e. kept prisoner for some unknown reason (second possibility where he could still be alive and not evil. But lets face it this one is unlikely)
3. Drakul did a «sent to Outer Mongolia». Meaning he sent him away to simply get rid of him without any further plans for the poor Chandler. In which case
a. Chandler is dead (sent in an inhospitable place like in the sun, in hell, outside of this reality or where ever you can imagine the poor lad)
b. Chandler is alive but unable to come back hence his not coming back. I can see Chandler being sent in an inhospitable place and being in a constant fight for his life. (this is in my mind the most not unlikely scenario for him being alive without being on team evil. In this case Harry and Ramirez could have a reason to bridge their divide and go rescue him
).