Legal Question in Wills and Trusts in California

No, although a provision in a will or trust that conditions receiving a bequest on not being convicted of a felony would probably be quite valid.

Only if there are amounts owed to the State of California in excess of the amount of the inheritance.

Being a felon does not disinherit you generally. If you kill the person and are convicted of it, you will not be allowed and a Will can provide terms like 'as long as she has no felonies" and will likely work. Otherwise, just the fact of being a felon will not cut you out. There may be liens against any inheritance, as mentioned above.