My question involves estate proceedings in the state of: New Jersey

This is a complicated situation that my family and I really need help with. If this issue sounds familiar, its because I have posted about it over 2 years ago and its still not resolved.

Anyway, In April of 2010, my father-in-law murdered my mother-in-law. He was named executor in her will and if he was unable to fulfill his duties, my husband's grandmother was named after him. From the time of the murder up until now, he has refused to sign papers to renunciate his executorship to let us probate the will. Right now, the will is in probate court, but there is a caveat on it to prevent him from trying to do anything with it. About a year ago, my brother-in-law and I consulted with an estate lawyer to see if we could somehow sue to get his name taken off as executor (yes, we know that one hasn't even been appointed yet, so technically he isn't even executor), but we were told we just have to wait until the trial for his conviction. The trial will be coming up soon, so I had my husband call the probate court to inquire about the procedure of having him removed once he is convicted. Whoever my husband spoke with told him that there are "different levels of murder and that he may still be entitled to be the executor" (I'm not so sure the she understood that he is going to be on trial for the murder of my MIL...my H didn't exactly make it clear). The prosecution team has told us they believe that his lawyer will try to go for the passion/provocation manslaughter charge, which it is my understanding that this is still a felony. Would this fall into one of those "levels" that would allow him to still serve as executor if he ended up being convicted of that charge (rather than 1st degree which is what the prosecution is going for)? And if so, how does that play out with the Slayer's Rule? There is a life insurance policy as stake in this situation.

So, my original question is basically, when he is convicted (of whatever charge), what is the process that we will have to go through to show the court that he should not be named as executor? How long does this process take? And, as for hiring a lawyer, how much would a typical fee be for this?

Any input you can give me in this matter would be greatly appreciated! Thanks!