OSCEOLA COUNTY, Fla. – Osceola County Sheriff’s detectives have closed two unsolved cases, bringing long-awaited answers to the families of the victims, officials said.
Seventeen-year-old De’Andre Nathaniel Wellnitz was stabbed to death at a house party at 163 Ivy Lane in Kissimmee on June 24, 2007. The investigation went cold after months of work.
A person of interest in the case was found in Orlando in September 2025. Deputies said the person said he was struck during a fight and picked up a kitchen knife and waved it to keep others away. The sheriff’s office said it was determined to be self-defense, and no charges were filed…