a man police hope can help solve the murder of andrea sangt john 12 days before christmas. sheriffs are also looking for a car seen in the neighborhood around the same time. a 2011 to 2013 toyota corolla like this one. >> we're not naming this person as a suspect, but we're saying they're a person of interest, maybe either a witness or somebody that we need to alleviate as being involved in this case. >> reporter: a widow, a mother and grandmother, st. john was found dead inside the garage of her home, a house that had been set on fire the night of december 13th. an autopsy revealed that st. john was murdered before the fire. neighbors tell us they haven't been able to rest easy in the weeks since st. john's murder here and they won't until police make an arrest. >> and i'm deathly afraid every day. >> reporter: franny irwin can see st. john's gutted home from her front porch almost directly across the street. >> so it's definitely a hard time for everybody. i used to see more people out. we don't see anybody anymore. everybody is locked in their homes. >> we have no idea a