this morning on "world news now" -- developing story from new hampshire where five police officers on a small town force were all shot. >> the police chief just days away from his retirement was killed. a standoff continuing for hours into early this morning. it's friday, april 13th. >> announcer: from abc news, this is "world news now." >> good morning, everybody, on this friday the 13th. i'm rob nelson. >> my first date with my husband was on friday the 13th. >> so it could be a good luck thing. >> i'm paula faris. people in the small coastal town in new hampshire rarely see crime scenes. and the tragedy that's taken place there is unthinkable.