A traffic stop at a local school zone turned into a police chase. It started around 9 a.m. at the Sunset Acres Neighborhood. Police say the suspect crashed into a tree, but managed to escape the officer. Authorities had to lock down Werner Park Elementary School. At last check, no arrests were made. Officers say it looks as if the suspect received a head injury during the collision. If you have any information on this case, call Shreveport Police.