Age: 53
Residence: Pequot Lakes, Minn.
Role: Mother of victim, plans to attend trial, and if jurors convict Rodriguez, will testify about the crime's impact on her life
Background: Since daughter's disappearance, Walker has actively sought congressional approval of "Dru's Law," a national registry of sex offenders; The family also started www.drusvoice.com , a Web site dedicated to Dru Sjodin's life
