investigators say dennis chamberlain was threatening a woman inside the home with a weapon. they say he then shot at law enforcement. a negotiator was brought in and after two hours --- chamberlain was arrested. he's been charged with several crimes -- including attempted murder. new details this afternoon: a man arrested after dubuque police responded to shots fired --is now charged with attempted murder. allegedly firing a gun in dubuque last week. a witness also telling police that a person known as little derrick aimed a handgun at burrell --but the gun jammed. they say the two men were meeting at a home on eighth street when burrell fired his weapon. nobody got hurt. investigators are working to figure out what happened after two people were found dead in iowa. the two were found inside a prairie city home. neighbors say this is the first "it makes you wonder, you worried, i mean, you know, every ten years, it's about what goes on around here. something stupid, or a tragedy, will happen." the victims' names have not been released. investigators -- and a family -- wonder