for missing morgan hill teenager sierra lamar. supporters say they will not give up their quest for any new signs for her. why the case may also inspire changes at california schools. >> reporter: 40 volunteers rallied this morning at the search rally set up for missing teenager sierra lamar. soon it will be six months since the 15-year-old disappeared. >> it's still just as painful. >> reporter: this morning, congresswoman thanked volunteers for their efforts. 21-year-old torres had been arrested for sierra lamar's murder but her body has never been found. sierra disappeared when she left home and was walking to school. the high school didn't notify sierra lamar's parents that she didn't show up. they want to require school districts to alert parents right away. >> whether a child has been abducted or is merely playing