The collision involved an SUV and a Harley-Davidson motorcycle, the California Highway Patrol said.
The fatal crash happened at the Grant Street onramp to state Highway 242.
Concord resident Nicholas Brandon Moseby, a biology teacher and cheer coach, was arrested on suspicion of committing lewd acts on minors.
Hoffmeister pleaded no contest to the DUI she was arrested for in May in Clayton.
Detectives were working to identify the suspect and determine a possible motive.
Gerardo Ramirez-Vera and Jorge Garcia-Escamillia escaped Sunday from Marsh Creek Detention Facility; Garcia-Escamillia remains missing.
Five elementary schools and a charter school were vandalized in the West Contra Costa County Unified School District over the summer.
Officers contacted 314 vehicles in a Concord DUI checkpoint Friday night.
"We are looking for impaired drivers because driving under the influence is dangerous and puts others on the road at risk."
The driver left the roadway and hit the center divider, according to the California Highway Patrol.
Monument Boulevard was closed for nearly five hours Wednesday as the fatal crash was investigated.
Three cars were involved in the crash early Monday on state Highway 4 near Willow Pass Road.
A juvenile has been arrested on suspicion of shooting and killing a man at a Brentwood gym early Thursday morning, police said Friday.
Fight turns deadly in gym parking lot; registered sex offender accused of trying to lure two girls; former sheriff's volunteer arraigned.
Police detained two people in connection with the shooting outside a 24 Hour Fitness gym.
It is alleged that John Michael King, 54, was found with a cache of 132 illegal guns and assault rifles, some of which he manufactured.
One man in his 20s was pronounced dead at the scene, and the three others brought themselves to hospitals, police said.
The suspect in an incident in Walnut Creek was identified as a 37-year-old Concord man following an extensive investigation, police said.
The leadership changes are part of a reorganization following the annexation of East Contra Costa Fire Protection District.
Authorities have identified a 27-year-old Discovery Bay Woman as a pedestrian who was fatally struck by a suspected DUI driver.
This new, shorter phone number will make it easier for people to remember and access mental health crisis services.
The Concord Police Department announced it will have extra officers on patrol Saturday.
A blaze in the middle of June started at the golf course and quickly raced up to nearby homes.
Mark your calendars! The free event with kids' activities and K-9 unit demos will be at the Concord library.
The stubborn Marsh Fire is burning peat, which fire officials say is very difficult to extinguish.
Admitted "meth user" with gun, smoldering Marsh Fire affects air, fiery fatal crash and other police & fire news this week from East Bay.
The two-vehicle collision was Thursday near James Donlon and Contra Loma boulevards, police said.
"It is suspected that (Christopher) Owens has committed rapes in multiple jurisdictions over many years," police said.
Christopher Owens is jailed on $8 million bail, accused of crimes dating to 2017 in Concord, Walnut Creek, Pacheco & Pleasant Hill.
Officers Andrew Mathers and Justin Caballero were sworn in Monday.
As Cal Fire used water-dropping helicopters to stop a Marsh Fire flair-up in Pittsburg, drone pilots are being asked to stay out of the way.
"Plastics Piranha," an autonomous rover that collects debris from waterways, arrives next week.
The Solano County boy was one of five people in a car that was hit by an Amtrak train June 26 near Brentwood.
Phillip Moussa, 43, was arraigned this week on nine felony counts related to arranging to meet a minor for sex, the DA's Office said.
The phone line connects residents with local law enforcement non-emergency lines to report illegal fireworks use.
The move brings 128,000 East Contra Costa residents under the purview of Con Fire and is expected to improve and streamline services.
Two others in the car suffered major injuries, including a child.
Contra Costa County officials reminded communities about the dangers of fireworks, especially during the prolonged drought.
The train crossing is the site of frequent crashes, according to a Contra Costa County fire official.
The rapidly spreading grass fire broke out near Kirker Pass Road and Hess Road, Con Fire said.