An off-duty pilot riding in the cockpit of an Alaska Airlines’ Horizon Air flight bound for San Francisco International Airport (SFO) tried to crash the plane, officials say.

The San Francisco-bound flight on Sunday diverted to Portland, where it was met by law enforcement officers. The flight took off from Everett, Washington, at 5:23 p.m. and landed in Portland an hour later.

Federal officials allege Joseph David Emerson tried to shut down the engines in midflight and had to be subdued by the two pilots.

Authorities in Portland identified the man as Emerson, 44. He was being held Monday on dozens of counts of attempted murder and reckless endangerment, according to the Multnomah County Sher