By Sara Quam
Reward money of $50,000 in the case of Carrie Nelson's murder expires Dec. 31.
Spotlight on Crime, which offers the reward, selects violent crimes and attaches a time limit to the money.
Carrie's mother, Nan Karr-Kaufenburg, said, "I think the money has generated some leads."
Because the money is still offered for a few days, she hopes people will see that as incentive to call if they haven't already.
"I just talked to investigators this week and they're still working on it and it's still on top of their heads," she said.
Although a lot of time has passed since the May murder, Karr-Kaufenburg and investigators are still hopeful that the crime will be solved.
The original reward of up to $10,000 is still offered to whoever leaves information with investigators that leads to a conviction.
Nelson, 20, was murdered May 20 while working at Blue Mound State Park outside of Luverne.
Still key to solving the murder is information on the watch found at the scene of the beating. Investigators think the watch was worn by the person responsible for the robbery and murder.
The digital watch face bears the logo "Field Ranger" and is silver. The watchband is tan with brown leather accents.
Anyone with information that could help investigators is asked to call the tip line at (507) 283-1301.