>> we realize that missing persons cases, there is a family at the other and enduring heart ache not knowing what's happening to their loved one. >> the fbi is now offering a $25,000 reward for the arrest and conviction of whomever is responsible. and the family and community are still waiting for answers. >> martha: here with mark, john finds, burlington city police chief. thanks for being here. why release the audio now? >> our community has been going through a lot, trying to recover and trying to figure out what happened with margaret fox. and, in order to release it. >> or any tips coming in yet? >> so far we have one and we