Investigators released a man who was being questioned Thursday in connection with a possible child sex crime that may have happened in the area of Morris and 23rd Street.

Police received a call just before 1 p.m. Wednesday about a man spotted with a young girl inside of a pickup truck. A witness said they saw an inappropriate act going on inside the truck and called 911.

Police got to the scene but couldn't find anything.

Detectives worked the case overnight and took a man in for questioning Thursday morning. They also impounded his truck. That man was released later in the afternoon.

Police are continuing their investigation.