News Release News Release The City of Palo Alto
Communications Department
250 Hamilton Ave
Palo Alto, CA 94301


Subject :

Man Arrested Following Downtown Skateboard Attack
Contact : Craig Lee, Sergeant, Police Department    650-329-2413
Booking Photograph

Palo Alto, CA – Police arrested a man Wednesday morning after he attacked a pedestrian with a skateboard. 

On Wednesday, July 10, 2019 at about 11:40 a.m., our 24-hour dispatch center received a call from a man reporting that he had just been assaulted on the 500 block of University Avenue. Officers responded to the area, located the suspect inside of a nearby business, and detained him without incident.

The investigation revealed that the victim, a man in his twenties, was walking westbound on the 500 block of University Avenue when he was accosted by a male subject he did not know. The subject yelled nonsensically and then punched the victim in the face.  After punching the victim, the suspect used a skateboard to strike the victim in the abdomen.  As the victim fled and called police, the suspect continued to yell unintelligibly at the victim.  The suspect then threw a rock toward the victim before walking away.  The victim sustained minor injuries to his face and torso. 

Officers booked the suspect, 38-year-old Tristan Mackreth, who has no permanent city of residence, into the Santa Clara County Main jail for assault with a deadly weapon and criminal threats, both felonies. A booking photograph is attached.

Anyone with information about this incident is asked to call our 24-hour dispatch center at 650-329-2413. Anonymous tips can be e-mailed to or sent via text message or voice mail to 650-383-8984.  Tips can also be submitted anonymously through our free mobile app, downloadable at or