Well, they might if they're trying to convince everyone they've defected and can be trusted. 

Osirion has Lawful Evil priests of Abadar, though not many of them; usually, they are young and intend to fix it before they grow old. The request, on short notice, will run about 10,000gp, results not guaranteed, and they'll arrest Sevar's ally once they raise him.

Well, they might if they're trying to convince everyone they've defected and can be trusted. 

Osirion has Lawful Evil wizards and some priests of Abadar, though not many of them; usually, they are young and intend to fix it before they grow old. The request, on short notice, will run about 10,000gp, results not guaranteed, and they'll arrest Sevar's ally once they raise him.