BOSTON -- It was eight years ago Friday that Warren teenager Molly Bish disappeared from her summer lifeguard job.

NewsCenter 5's Pam Cross reported that her family has lived a nightmare, not knowing who killed the popular teen. Molly was last seen getting ready to lifeguard at Comins Pond. She had arrived just before the beach opened for swimming.

VIDEO: Family Marks 8th Year Of Teen's Disappearance

"There is no end to this story. Someone took Molly that day. We don't know who. We don't know why," said Molly's mother, Magi Bish.

Three years after her disappearance, the 16-year-old's remains were discovered. Her parents have spent years making appearances at the Statehouse.

They've conducted dozens of stranger awareness workshops for parents and children.

"We teach this stuff, and it is very hard to protect them because they are so trusting," said Molly's father, John Bish.

Last year, John Bish couldn't talk. He suffered cancer and then a major stroke. Today he's improving, but the desire for answers remains strong.

"It will never bring her back for us. We know that," Magi Bish said. "It's the reality we live with everyday, but this person has changed our lives. He owes us a debt to us and the community."

The Bish family said that they are sustained by friends and family.

"We're having 25 yellow roses because she'll be 25 soon, and I'm thinking how would Molly be at 25?" Magi Bish said.

Friends will join the Bish family Friday night to pray for the safety of all children and to renew their pledge to find justice for Molly.

Since last June, investigators have received about 100 tips in the Bish case. Detectives are seeking information from two persons of interest that they haven't met with in the past.