Francisco A. Escalante-Diaz

Francisco A. Escalante-Diaz, 21, of Tucson, Sgt. Fabian Pacheco said. The warrant charges him with aggravated assault with a deadly weapon and drive-by shooting.
Pacheco said the officer was driving west on Speedway Boulevard about 10:30 a.m. last Friday when he noticed a car in front of him driving erratically.
After both cars turned south on Stone Avenue, the officer pulled up to the right of the car, a gold 1994 Lexus, Pacheco said.
The passenger yelled an obscene comment and pointed a handgun at him, he said.
Then the man pulled the trigger. Pacheco said the officer, who identified himself as a policeman, was not hurt but his car was hit. The officer did not shoot back.
The car continued south on Stone, Pacheco said. The officer remained at the scene.
Escalante-Diaz served almost eight months in prison in the past year, according to the Department of Corrections Web site. He served time for convictions of criminal damage, weapons misconduct, possession of drug paraphernalia, resisting arrest and violating parole. The Web site said he was released in June.
A Pima County Jail clerk said Escalante-Diaz listed his address for his most recent conviction in the 1300 block of West Simmons Place.
Police have yet to identify the driver of the car, Pacheco said. The driver could face charges in connection with the incident.