An officer stopped a vehicle on the 900 block of Hopkins Way for allegedly failing to use its turn signal and not stopping at the limit line of a stop sign.
The officer contacted the vehicle occupants, and one of the men had a search clause because of a prior conviction, police said.
Police reports allege the officer found heroin, methamphetamine, psilocybin and mushrooms in the possession of Thomas Gloede and Amber Lynn Montano.
Gloede, 26, and Montano, 25, were arrested for suspected possession of a controlled substance for sale, possession of drug paraphernalia, possession of methamphetamine and violation of probation.
The other two vehicle occupants — Mitch Dunne and Courtney Montano — were arrested on suspicion of possessing a controlled substance. All four were booked at Santa Rita Jail in Dublin.
In other police reports:
* A dog fight on Sandalwood Drive resulted in a Labrador retriever being injured June 16.
The Labrador was bit by a pit bull mix and received stitches to treat its injuries, according to police.
* Items worth more than $1,000 were reportedly stolen from a Kaiser office on Hacienda Drive.
The reporting party contacted police on June 18 and said the theft occurred between June 12-13, according to police reports.
The items stolen included an HP laptop, an iPhone 5 and a worker's Kaiser access card, police said. The case remains under investigation
* Macy's loss prevention officers helped lead police to a 20-year-old Windsor man suspected of stealing from the store.
Andrew Michael Bahno is accused of taking two pairs of jeans and one shirt from Macy's at Stoneridge Mall after the unpaid-for items were found in his possession June 19, according to police.
* A citizen report led to the recovery of a stolen vehicle on June 19, police said.
The caller reported a Ford E-150 van was parked along Pickens Lane for a long time, and responding officers later discovered the vehicle was reported stolen from Petaluma. No arrests have been made.
* Hair-styling tools worth more than $4,500 were allegedly stolen after an unknown person burglarized a Main Street salon last week.
According to police, the burglary occurred between June 20-21 at Garret and Company Hair Designs.
The culprit gained entry through the rear door, which resulted in $100 worth of damage to the rear door handle of the salon, police said.
In all, 7 zipper pouches with hair-cutting scissors were stolen, as well as hair clippers and $80 in cash, according to police reports. No arrests have been made.
Under the law, those arrested are considered innocent until convicted.