What a terrible violation of trust, I can't begin to feel your families pain.
But I know that if you are concerned enough to post here asking for help then you are determined to do everything you can for your daughter.
We are a site for adult males, but that doesn't mean we would abandon you, far from it. I'm certain people here will recommend places that are suited to your families needs.
Here's three for a start. The US Gov't site is good, Pandoras Box is excellent and the Canadian site also has some very sensible and clear advice.
A Service of the Children's Bureau, Administration for Children and Families,
U.S. Department of Health and Human Services
For more information, contact:
National Clearinghouse on Child Abuse and Neglect Information
330 C Street, SW
Washington, DC 20447
Phone: (800) 394-3366 or (703) 385-7565
Fax: (703) 385-3206
E-mail: firstname.lastname@example.org http://nccanch.acf.hhs.gov/pubs/usermanuals/sexabuse/index.cfm
The Secrecy of Child Sexual Abuse
Dr. Nancy Faulkner http://www.prevent-abuse-now.com/index.htm
Central Agencies Sexual Abuse Treatment Program http://www.casat.on.ca/handindx.htm