Here are sources of help and information for women who may be suffering domestic violence.
National Domestic Violence Hotline: 800-799-SAFE
Futures Without Violence, formerly Family Violence Prevention Fund, works to prevent and end violence against women and children around the world.
The Nicole Brown Foundation: The nonprofit and advocacy group raises awareness against domestic violence surrounding women.
National Teen Dating Abuse Helpline: 866-331-9474
Love Is Respect: This website, and the help line directly above, are geared toward people in their teens and early 20s, as well as their parents.
Dr. Jill Murray is an expert in improving destructive relationships.
Day One: This organization works in the five boroughs of New York City to combat dating abuse and domestic violence by empowering young people to seek and keep safe relationships. Day One offers community education, supportive services, legal advocacy and leadership development. According to their website, the group has educated more than 20,000 youth since 2003.
Watch the amazing story of Nancy Tyler, whose ex-husband held her hostage at the home they once shared, on "20/20" Friday at 10/9c.