By Sara Quam
Authorities have released more information that they hope will help in the investigation of Carrie Nelson's murder.
A wristwatch (pictured) was found at the homicide scene at Blue Mounds State Park, where Nelson, 20, was working the day she died of head injuries.
Because it appears to have been torn at one end, and because it was found near the body, 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 knowledge of a person wearing a watch matching this description prior to the May 20 homicide is asked to call the tip line at (507) 283-1301.
The reward for information leading to arrest and conviction of the person or persons responsible for the murder has been increased to $15,000. Since information on the watch was released, the Sheriff's Office has already received some tips regarding it.
Investigators say the park's office money bags have not yet been found. The money bags are gray and are labeled "Minnwest Bank." They are still seeking information regarding a large white car seen speeding away from Blue Mounds State Park between 2:15 and 2:30 p.m. Sunday, May 20. Nelson was found dead at 2:45 in the park office.