(Photo : Washington State Patrol)
Elias Huizar is accused of kidnapping his son.

A fugitive ex-cop who authorities say went on the run after allegedly killing his ex-wife and 17-year-old girlfriend in Washington state may have been spotted in Oregon, according to a report Tuesday.

A clerk at a Plaid Pantry convenience store on Hayden Island in the Columbia River between Portand, Oregon, and Vancouver, Washington, told Portland police he might have seen Elias Huizar early Tuesday, according to TV station KGW8.

The clerk reportedly said the man he saw bought a drink in the store around 12:45 a.m.

The man was also traveling with a child in the back seat of his vehicle, described as a black sedan, KGW8 said.

Police searched the area but didn't find Huizar, the child or the vehicle.

Hayden Island is about 200 miles west of West Richland, Washington, where Huizar's ex-wife and girlfriend were slain.

On Monday night, the Washington State Patrol issued an Amber Alert for Huizar and his 1-year-old son Roman and said Huizar might be headed to Mexico.

Huizar was last known to be driving a silver 2009 Toyota Corolla, according to the WSP.

Authorities have said the fugitive former Yakima, Washington, police officer should be considered armed and dangerous.

Huizar was facing a Feb. 3 rape charge involving a teenage girl when he allegedly shot his ex-wife, Amber Rodriguez,  around 3:20 p.m. Monday outside the school in West Richland, Washington, where she worked as a paraeducator.

Cops reportedly found the body of Huizar's girlfriend Angelica Santos, who is Roman's mother, when they searched his nearby home.