"Our goal is to release it is as soon as we can, and we've evolved into that," Police Chief Daniel Hahn said.
Vehicle goes up in flames after gaining "unauthorized" access to the base in Northern California.
A crime is classified as terrorism only if it is politically motivated.
The charges were dropped a day before then-Secretary of State Rex Tillerson was to meet with Turkey's president. The State Dept. said that's a coincidence.
"They know better than to not shut that roadway down right before that collapse."