It would depend on the type of necromancy, but at the end of the day, I think it would still be a conflict of interest since the person bringing them back would have great say, unless they are considered some type of expert witness necromancer.
Necromancy is the practice of magic involving communication with the dead by summoning their spirits as apparitions or visions for the purpose of divination; imparting the means to foretell future events and discover hidden knowledge.
The necromancer’s capacity to create minions and command them to fight for him or her is generally enough to satisfy even the most critical of viewers. As necromancers might easily be termed one-person armies, they are usually compelling and feared. The fact that they dabble in magic and the supernatural does not help their image as upstanding citizens.