>> no, he was not. he was the victim's husband. we didn't really focus on larry that much. >> and so, eric stellmacher, the former bomb squad commander, remained on everyone's radar screen. he was constantly by larry's side at the hospital, and still wanting to pitch in on the investigation. >> i called an investigator friend of mine and said, hey, you know, can i come in and talk with you. >> detectives thought the time had come to bring in stellmacher for questioning, but before they could speak with him, they received another phone tip. one which would send this investigation in a whole new direction. >> coming up -- a new direction, a new suspect, and finally, an arrest. >> you've got this whole package right there, so it's all right in a nutshell. that's what says, hook him. >> when "dateline continues."