Three hours before authorities say an off-duty cop in Los Angeles drunkenly crashed into two cars — killing three people — he posted a video on Instagram warning about the dangers of drinking and driving.

The 10-second clip, posted to LAPD Officer Edgar Verduzco’s account about 7 p.m. Tuesday, shows an avatar wearing a Los Angeles Dodgers shirt superimposed in front of a half-empty beer atop a bar counter, complete with the message: “#dontdrinkanddrive,” KTLA reported.

Three hours later, Verduzco — an Army vet who joined the department about two years ago — slammed the 2016 Chevy Camaro he was driving into two other cars on Interstate 605 in Whittier, killing a teenager and both his parents, police said. Verduzco was later booked on charges of driving under the influence and gross vehicular manslaughter, the Mercury News reported.

It’s unclear how fast Verduzco’s Camaro was moving at the time, but witnesses say the off-duty officer was speeding.

The teen and his parents died after they were trapped inside a Nissan that burst into flames. A 31-year-old woman in the second vehicle, a Toyota Scion, was also injured. Verduzco had a broken nose, KTLA reports.

Los Angeles Police Chief Charlie Beck said in a statement released Wednesday that the department has “no tolerance” for drunken driving and has launched an administrative investigation into the deadly crash.

“The LAPD understands the significant danger innocent drivers face when any person gets behind the wheel while they are impaired, which is why we conduct random sobriety checks throughout the city,” Beck said. “It is particularly troubling when one of our own police officers violates drunk driving laws, which is why a drunk driving offense always results in a personnel complaint which can lead to dismissal.”

LAPD officials have not confirmed that the Instagram account belongs to Verduzco, but a second video posted to the same account hours later shows a group of people playing Jenga, apparently at the same bar. KTLA said they were sent the Instagram story the day after the crash, KTLA reports.

But at least seven posts from earlier this month show the owner of the account wearing a LAPD uniform or other references to law enforcement duties. In one post from July, a name badge reading “Verduzco” is clearly shown, according to the station.

Verduzco remained jailed on $100,000 bail Thursday at the Men’s Central Jail in Los Angeles, jail records show.