it began with -- a message to the facebook page of the zanesville pd.tick up gang. >> we came and spoke with her and obtained a lot of valuable information for this investigation. >> detective phil michael, of the zanesville pd, had been working for two years on a string of armed robberies. when he got the facebook tipster in for an interview, guess who she identified as two members of the robbery crew. none other than serious underwood and josh daniels. if the tipster could be believed, they had been banned its two years before brandi had been shot to death. the woman confirmed something that detective michael had long suspected, but had been a unable to prove. the robbery of a local department store had been an inside job. josh daniels had been working at the store at the time, and handed over $7,000 to a masked gunman. if we had been here, on january 1st, 2012, what might we have seen? >> you can see an individual come from the southwest side of the parking lot, he stopped the gun in josh's face >> a pistol? >> yes. he ended up falling, down being kn