POLK COUNTY, WI (WHBL) - Authorities in northwest Wisconsin now say a missing two-year-old boy was found dead in the trunk of a car. Polk County Sheriff Pete Johnson says he would not come to any conclusions until an investigation is complete in the death of young Isaiah Thies. His family reported him missing Tuesday evening. They said he was last seen playing with his brother at their home in rural Centuria. Hundreds of volunteers joined rescuers yesterday in searching for Isaiah. Sheriff Johnson said a deputy had looked in-and-around the auto several times, and was told the vehicle was locked before the child disappeared. The vehicle’s owner came back around 10:15 last evening to drive it away – and the officer found Isaiah’s body in the trunk while searching the car. Authorities did not say if the car’s owner was arrested, or is even a person-of-interest in the incident.