By Walt Hunter

PHILADELPHIA (CBS) — A new FBI Cold Case Task Force is now looking into the disappearance of Richard Petrone Jr. and Danielle Imbo who vanished on February 19, 2005.

READ MORE: Stella The Pit Bull, Gloucester County Animal Shelter's Longest Resident, Adopted

They were last seen leaving a bar and restaurant on South Street, heading home to Mt. Laurel. They never made it.

Petrone’s mom, Marge and his dad, Richard, told CBS 3’s Walt Hunter they are holding onto hope that the case will be solved.

“Somebody has to pay for this, you can’t just kill two people for no reason,” Marge Petrone explained,as she held tightly to her husband’s hand.

“The FBI said it’s murder for hire, and we’re treating it as murder for hire, that’s what I believe it is,” explained Richard Petrone.

READ MORE: 'This Is Do Or Die': Congressman Dwight Evans' Urgent Message For President Biden, Philadelphia Mayor Kenney On Gun Violence

For now the identities of the killers and the motive remain a mystery.

“We’re hoping for a break essentially at this point,” stated FBI Agent J.J. Klaver.

The Petrones, remembering Richard as a loving son who was devoted to the daughter he was raising, believe there will be answers.

“What was taken from me, I could never put into words, part of me was taken,”Mrs. Petrone explained.

MORE NEWS: Candidate For Pennsylvania Governor Says He Did Not Cause Fatal Accident

The FBI is planning a press conference for February 19, with new information on the reward being offered and how the public can help.