if my sister is power of attorney for my father and he has alzheimers do i as a son have the right to know about his financial situation. Gene

You don't have a legal right to have access to his finances.  That being said, if you are concerned that your sister is misusing funds pursuant to the power of attorney, you should speak with an attorney with experience in elder abuse issues as well as estate dispute and inheritance dispute issues.  Most lawyers with expertise in these areas offer free initial consultations, so it typically can't hurt to talk with an attorney.  Good luck going forward. Jay Mills Burns, Day & Presnell, P.A. 919.235.3824 (phone) jmills@bdppa.com