Resurrecting a deceased loved one

Hi Eric,
I noticed many services offered by you and fellow magicians. For some reason there is one service that none of you will offer. That service is bringing back a deceased loved one. Is there a reason none of you will do it? Do you know of anyone that will? If not,can you at least tell me where I can find this information out on how to do it myself? I will be very grateful for your help. Thanks.