police in florida now admit to a serious mistake during their surveillance of brian laundrie. they mistook brian's mother roberta for him. now it happened in the days after laundrie's fiance gabby petito was reported missing but before her body was found in a national forest in wyoming. laundrie's remains were found just last week in a nature reserve near his family's florida home. cnn correspondent nick neri noins us from north port, florida, with details. nick, how did this mix-up happen? >> reporter: you know, at a time when the whole world was watching the north port police department, when they needed to be perfect, they simply put dropped the ball in their surveillance of him. this took place, according to police, in the middle of september when laundrie had yet to be named a person of interest, but they found his actions suspicious enough that