Officers responded to a 911 call from someone reporting a body in a vehicle at South King Road and San Antonio Street at 12:41 p.m., Sgt. Heather Randol said.
The person was found unresponsive and was pronounced dead at the scene at 12:45 p.m., she said.
The death has not been classified as a murder, but the Police Department's homicide unit is investigating the case as a matter of protocol, Randol said.
Police said all of the children at the elementary school are safe and that there is no public safety issue.