SAN JOSE (CBS SF) — A 22-year-old San Jose man has been charged with murder for allegedly selling pills containing fentanyl to a teenage couple that lead to an overdose death, Santa Clara prosecutors announced Tuesday.

The Santa Clara County District Attorney’s Office said it has charged Anthony Minjares with murder and numerous narcotics-related felonies in connection with an 18-year-old Santa Clara girl’s death last week. If convicted, he could be sentenced to life in prison.

READ MORE: UPDATE: Streets Flood in San Rafael, Mill Valley as Wild Storm Lashes Bay Area

Investigators said the girl and her 17-year-old boyfriend bought the powerful fake opioid pills through Snapchat.

The two teens – thinking they were buying Percocet – bought the counterfeit pills that contained fentanyl – not oxycodone – as well as other drugs allegedly from Minjares on April 5.

By that evening, the male victim was unresponsive. His life was saved by quick-acting firefighters using Naloxone. The female was found hours later that night in an upstairs bedroom. She could not be revived.

Prosecutors charged Minjares with murder under the theory that he advertised and sold the fake pills despite knowing they were extremely dangerous.

READ MORE: UPDATE: Atmospheric River Crashes Onshore; Flood Warning Issued For Napa, Sonoma Counties

“The destructive and devastating power of illegal opioids has ravaged many parts of this country,” District Attorney Jeff Rosen said. “The recklessness of those who peddle these extremely dangerous and illegal counterfeit drugs is tantamount, legally and ethically, to murder.”

Fatal fentanyl-related overdoses have spiked in Santa Clara County in recent weeks. Fentanyl is a powerful synthetic opioid that is far more toxic than most other opioids and is the leading cause of overdose deaths in America.

Officials issued a warning that they are seeing a potentially deadly variant of the drug flooding the illegal drug market.

On April 9, Santa Clara police investigators arrested Minjares, seizing drugs, paraphernalia and cash.

Fentanyl is approximately 50 to 100 times more toxic than morphine. Just a few grains can cause a fatal overdose. Illicit fentanyl is sometimes pressed into pills made to look like other prescription pills (like oxycodone, hydrocodone, Xanax and others.)

MORE NEWS: Stephen Curry Reaches 5,000 Assists, Warriors Beat Kings 119-107

In Santa Clara County, fentanyl is especially prevalent infake generic pills designed to look like Mallinckrodt-manufactured 30 milligram oxycodone hydrochloride (called “M30s,” “M-box-30s,”“pressed blues,” “blues,” “Oxy,” Mexican Oxy” and other names).