Armed Subject Identified and Arrested in Arden Area Incident 

May 3, 2026 – Sacramento County Sheriff’s Office officials report that on the evening of April 30, North Patrol Deputies responded to the area of La Sierra Drive in the Arden area, about a man armed with a knife, acting bizarre, approaching residences and reportedly attempting to access homes. That incident, which was captured on doorbell cameras understandably raised significant concern among residents.

Through investigation, Deputies identified the suspect as 56-year-old Brian Mattson. He was located and arrested this morning without incident. Through their investigation, the only crime they could charge him with was criminal trespassing, a misdemeanor.

Deputies learned Mattson was on felony probation; but Sacramento County Probation declined to place a probation hold. As a result, he was released from custody in less than two hours after being booked.

For public safety awareness, we are releasing Mattson’s photo. We are asking anyone who may have had contact with him, or who may have been a victim of any unreported crimes during this incident, to come forward. Additional victims and information could lead to further charges.

UPDATE: Just hours after his release, North Patrol Deputies responded to a business near Fair Oaks Boulevard and San Lucas Way for a report of Brian Mattson trespassing on the property. Deputies arrived and located him on site, and he was taken into custody without incident.

This time, a violation of probation hold was approved, and Mattson is currently in custody at the Sacramento County Main Jail.

If you recognize this individual or believe you were contacted or targeted, please contact the Sacramento County Sheriff’s Office at (916) 874-5115.

View video here.

Source & photo: Sacramento County Sheriff’s Office