this is the residential street where her family believes andrea knabel was headed. she never made it. she disappeared. which is why you find this poster looking for her all over this area. her family goes door to door searching for hope. >> we really appreciate it. >> reporter: knabel a 37-year-old single mother of two disappeared august 13th. she left her sister's house upset and was last seen talking on her cell phone, walking toward her mother's house about a half mile away. >> my life is not the same right now without her. >> reporter: erin fecker is her sister and this is her father. they told us andrea reentsly lost her job and was going through a rough patch. >> reporter: no one has heard anything? >> nothing. >> randomly it hits you and you get really upset. >> reporter: i hope she didn't come out on a busy thoroughfare like this and take a ride to go to someone else's house and never made it, got into the wrong car. >> reporter: that's the worry. >> that's the worry. >> reporter: a volunteer group called missing in america has joined the search. >> this is