Violent offender leads deputies on chase in North County

April 15, 2016
Jason Robert McMaster

Jason Robert McMaster

A San Luis Obispo man with a violent criminal history led San Luis Obispo County Sheriff’s deputies on a high-speed chase in North County on Thursday. After a 17-minute pursuit, deputies arrested Jason Robert McMaster, as well as his female passenger.

Shortly after 11 a.m., McMaster, 42, was driving eastbound on Highway 41 in rural Templeton when a deputy noticed McMaster’s white BMW had false registration tags and was traveling at an unsafe speed, according to a sheriff’s office press release. The deputy tried to conduct a traffic stop, but McMaster fled.

During the chase, McMaster, at times, exceeded 90 mph on rural county roads.

Deputies tracked down McMaster at the intersection of Creston Road and El Pomar Drive where he drove off the road to avoid a spike strip. Deputies then arrested McMaster and his female passenger.

When deputies searched the vehicle, they found a loaded handgun.

McMaster was charged with having an outstanding warrant, felony evading police and misdemeanor vehicle code violations. At the time, he was wanted for an outstanding a $100,000 warrant for the transportation of a controlled substance and possession of a controlled substance for sale.

Chelsea Ann Deperna

Chelsea Ann Deperna

Deputies identified McMaster’s passenger as San Luis Obispo resident Chelsea Ann Deperna, 33. Deperna was charged with being a felon in possession of a firearm.

Both McMaster and Deperna currently remain in San Luis Obispo County Jail. McMaster’s bail is set at $625,000, and Deperna’s bail is set at $20,000.

In December, deputies stopped McMaster while he was riding a motorcycle in Grover Beach. They found an ounce of methamphetamine and body armor in his possession and arrested him.

In 2011, two months after McMaster was paroled from prison, he assaulted and threatened to kill police officers who responded to a call about a man acting strangely and yelling profanities at Santa Rosa Park in San Luis Obispo. McMaster violently resisted arrest, and several officers received abrasions and bruising during the skirmish. McMaster landed in the hospital with serious injuries.

After arresting McMaster in December, the sheriff’s office stated he was a known associate or member of a local criminal street gang. The sheriff’s office made no mention of McMaster’s alleged gang affiliation in Thursday’s news release.

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“Criminal street gang affiliation?”

Well, he obviously ain’t a crip or a vato, so what is this, some biker thing?

I’ve lived in various CA counties and always found sheriff departments to be the least professional of all law enforcement. If you defend yourself against bullies in any other situation where law enforcement is not the offensive gang, you are applauded. Otherwise, you have serious injuries if not perforations. You wind up defending yourself in court, if you are lucky to be alive, for the self inflicted bruises and abrasions that these ‘professionals’ acquire during a dereliction of duty for which they are unqualified.

Your post reminds me of the song, “I fought the law and the law won”. In case you missed the How it Works section of law enforcement, I’ll clue you in. They get paid to win.

I am so proud of our SLO deputies. They are brave heroes.

Your song reminds me of another one I don’t like: “I Shot The Sheriff” tho I am a big fan of Clapton.

I have sent 3 complaints to SLOSD about unprofessional activity and all were answered with lame explanations by superiors. I have never complained about the poor choices I have observed off-duty deputies make (ie racing on Naciamento Rd. while intoxicated) because, well, boys will be boys.

Perhaps you can direct me to the ‘How It Works’ literature. Is that an unwritten rule where they must win at any cost, right or wrong, guilty or innocent, even if it involves overkill. I’ve always understood their directive to be “Protect & Serve”. Perhaps that only applies to their friends or relatives …. yourself for instance?

I have had drinks and jawed with several current and former members of the SLOSD. Their shop talk reveals some genuine creeps. I can only assume there are exceptions.

In a nutshell, do you have any idea what deputies, city cops and highway patrolmen all have in common? They all want to be highway patrolmen. How many deputies do you think were rejected by the state because they could not meet their higher standards?

They need to stop promoting from within and fill the upper ranks with bonafide and qualified professionals and eliminate the boneheads.

Way to go deputies and SLO county law enforcement!!! Although, I kinda hoped for a different ending.

My, my what are they

Eating up in

The north county?

Have they

Harmed nobody or

Everybody with their


Do not take this

Serious, I just wanted to be clever.

Awaiting cleverness…

It’s hard to care about people like this anymore.

There are too many of them, they’re sucking us dry.

Sick Boys

Bonnie and Clod

Lock him up and throw away the key, before we have to read where he has killed someone.

Brown, S. & Leedom, L. (2008). Women who love psychopaths: Inside the relationships of inevitable harm with psychopaths, sociopaths and narcissists. Fairfield, CT: Health and Well-Being Publications.

Jennings, Waylon, (1972) Ladies love outlaws like babies love stray dogs..

I think its more meth addicts hang with meth addicts.