Investigators who ran an undercover sting operation have been stung by a judge's ruling. Officers have had to round up the same suspects a second time.

When Trooper Scott Haugaard reports for duty he doesn't act his age. He plays the part of an underage girl or boy being enticed over the Internet into a sexual encounter.

"Mostly they try to look for easy prey," he tells us.

A few months ago, working with La Vista Police investigator, Haugaard made several arrests.

During the sting operation, five different men pulled into a public parking lot anticipating a rendezvous with an underage girl. Instead, each was arrested for child enticement but all their cases have been thrown out because of where the arrests took place.

The suspects believed that they emailed a young girl but they were actually in touch with the investigator. Both were in Douglas County.

The rendezvous and arrests took place in Sarpy County so a judge dismissed the charges.

Deputy Sarpy County Attorney Tricia Freeman says, "The act of enticing or contacting a child in an enticement case, there has to be some action in Sarpy County. The person using, that's using the computer is here, the person being enticed is here. We've got to be able to show some connection to the county."

Child enticement charges against the five suspects have been re-filed in Douglas County but the investigator, with help from other officers, had to re-arrest the same suspects.

Trooper Haugaard says, "We spent hundreds of man-hours again re-filing legal paperwork, going out and re-arresting these people."

Haugaard will continue the search for Internet predators.

He says, "This is just another speed bump. I'm not going to stop what we're doing here."

The investigator says that some of the suspects were shocked to be re-arrested on the same charge in Douglas County. They apparently believed that their legal troubles were over after the cases had been dismissed in Sarpy County.