A passerby spotted Tapper, who was at the wheel, and Anderson unconscious in the car in Boynton Beach.
Anderson, 27, told police he passed out from taking suboxone, a drug he’s using to help wean himself off heroin and that Tapper, 25, also took the drug.
But police said when they searched the car — finding cockroaches and the children’s diapers soiled — they found a bag of white powder they identified as heroin and fentanyl, a much more potent and deadly drug, in Anderson’s wallet.
The two survived, and authorities placed the children with a grandparent, according to a police report.
Both face charges of child neglect. Tapper also faces a DUI charge, and Anderson drug possession charges.
The state Department of Children and Families is investigating the incident, a spokeswoman said.
The overdose problem is becoming a nationwide problem, and hearing about them has become a daily occurrence. And while not as common, authorities in the state and nation are reporting more adults found overdosed in cars with their children inside.
In January, a couple in Florida's Sarasota County were found unconscious in their car at a gas station with their two children in the backseat. And in September, police in Ohio released a photo that went viral of a similar call. The photo showed two adults in the driver and passenger seats with a young boy in the back seat with his face blurred out.
Also in Ohio, a girl had to call 911 from the backseat of an SUV last Saturday in Cincinnati after her parents overdosed on heroin.