MILL VALLEY, Calif. (KGO) -- 21-year-old Fairfield resident Michael Kessler is in custody, facing weapons-related charges in connection with Monday's lockdown at Tam High School.
Kessler was arrested on the following charges: possession of weapon near school grounds, destroy/conceal evidence, brandish replica firearm, unlawful display of imitation firearm, change markings on imitation firearm.
RELATED: Lockdown lifted at Tam High School in Mill Valley after police activity in area
A heavy police presence descended on the high school at around 1:50 p.m. on Monday after it was reported that a man wearing a ski mask was walking around with an AK-47 near school property.
Police lifted the lockdown after several hours of searching when police say they believe the man left the area in a car.
Witness reports led police to track down the license plate of Kessler's car. Police contacted him by phone and Kessler turned himself into a Marin Sheriff substation.
"We did have a deputy that located a vehicle at a Good Earth parking lot in Tam junction and ran the license plate of that vehicle which returned to a rental company," said Sgt. Brenton Schneider at a press conference Wednesday morning detailing Kessler's arrest.
According to the Marin County sheriff, detectives were able to locate the AK-47, which was determined to be a replica AK-47 airsoft gun with electrical tape placed over the orange tip.
The AK-47 replica airsoft was discarded in bushes near a relatives residence in Mill Valley. Police say that Kessler admitted to using the airsoft gun and mask to shoot a Snapchat video near Tam High School.
The Marin County sheriff added that they have no reason to believe Kessler, who was a former student at Tam High School, intended on performing an act of violence on Tam High school.
Kessler is due in court on Thursday.
Former Tam High School student arrested after lockdown; replica weapon seized
More TOP STORIES News