CLARKSVILLE, Ind. (WDRB) -- On Halloween morning, Rebekah Lewellen went into Party City in Clarksville to pick up a last-minute costume for her 10-year-old.

It will be the first time little Adalee will go trick or treating. 

"Part of why I haven't taken her out is the safety reason," Lewellen said. "I was nervous about where to take her."

She knows there are sex offenders out there who use Halloween to prey on innocent kids going door to door.

"Even if they've been not doing it for the last 10 or 15 years, it would take one child to come into the situation at one given moment, and it could ruin someone's life," Lewellen said. 

It's a concern Clark County Prosecutor Jeremy Mull understands and works every day to prevent.

"My office has made that a No. 1 priority," he said.

Mull is cracking down on sex offenders. If the criminals don't register and meet requirements, Clark County is immediately aware.

"There, in fact, is a full-time assigned detective who does nothing but handle sex offense cases," Mull said. "Those are his primary duties."

A lot of counties don't have such a person. Clark County's assigned detective follows leads and hunts sex offenders down, while Mull takes care of the paperwork.

"I will immediately file a charge, a felony charge, and ask for an arrest warrant to be issued for that person," he said.

It is a very real problem in Jeffersonville, Clarksville and Charlestown.

"Up to even October of this year, I've filed dozens of these cases," Mull said.

That's 28 cases, to be exact.

Mull said eight of those people remain on the run in the midst of Halloween celebrations. But Mull's aggressive approach has worked before, and he said it will with the other cases too.

Still, Lewellen will be keeping a close eye on her daughter during Halloween celebrations.

"She will be well-guarded, that's for sure," she said.

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