Police met a 43-year-old computer technology specialist at the Portland airport Wednesday as he returned from an overseas trip and arrested him on allegations that he drugged and sexually assaulted four women he met at parties.

Portland detectives suspect

plied the women with drugs, including LSD, ecstasy and nitrous oxide, or laughing gas. They also suspect he used an autoinjector -- a spring-loaded medical syringe -- to deliver the drug in at least one case.

Police suspect other women also may have been attacked.

Later Wednesday, investigators searched a house at 7114 N. Chase Ave. that Pohlman rented and discovered "some sort of lab" in the garage, said Lt. Robert King of the Drugs and Vice Division.

They found chemicals and beakers and confiscated multiple samples of liquids found in jars and containers to test.

"At this point we don't what it is," King said.

Marlin Brandt Pohlman

Pohlman was arrested at the airport at 12:20 a.m. as he returned from Thailand.

He was booked into the Multnomah County Detention Center on two counts of first-degree kidnapping, two counts of first-degree rape, three counts of first-degree sex abuse, four counts of causing someone to ingest a controlled substance, four counts of third-degree assault, two counts of attempted first-degree rape, third-degree sodomy and four counts each of reckless endangerment and harassment.

Pohlman is being held on $2 million bail and will be arraigned Thursday afternoon in

.

Once in custody, Pohlman made a call to his mother in Oklahoma.

"He said he was in jail and that police had met him at the airport,'' said Wynema Pohlman. "For whatever reason, he was really vague."

"This is so totally out of character for him. I'm just at a loss," she said.

Police seek help

Detectives ask anyone with information about Marlin Pohlman to contact Detective Tracy Chamberlin at (503) 823-0400 or

.

Her son grew up in Oklahoma and taught himself how to use computers, she said. He had worked for Oracle Corp., but most recently was doing contracting work, she said. She last saw him in December, when they met in Los Angeles to celebrate Christmas.

"I raised both my sons the best that I knew how," she said. "That was not in this vein, for sure."

Marlin Pohlman is a three-time cancer survivor, having been diagnosed with Hodgkin's lymphoma, his mother said. He underwent a stem cell transplant and chemotherapy. He left Oklahoma largely because his body couldn't adapt to the heat in the summer, she said.

On his LinkedIn resume, Pohlman described himself as having served as "chief governance officer" at cloud computing giant EMC for two years beginning in 2010. During that time, he said he spoke at Intel and at trade conferences on cloud security.

In a statement, EMC said Pohlman had served in a non-managerial role and was fired a year ago this month. The company declined to say why it dismissed him.

A friend said Pohlman was doing contracting work more recently, helping companies comply with regulations surrounding technology.

When drugs and vice officers arrived at Pohlman's home about 7 a.m., a woman was at the home and cooperated and allowed officers in, King said.

Neighbor Jeanne Cullen said a police officer had parked his car in her driveway Tuesday night and sat there watching Pohlman's house from about 11 p.m. until other officers arrived in the morning.

Residents along the street said Pohlman had moved in about 1 1/2 to two years ago. He kept to himself, they said, but would wave back if they waved hello to him.

Next-door neighbor Judy Andrews said she noticed Pohlman often would come home late around 2 a.m.

Court records show he married a woman from Oklahoma in Hawaii in March 2007. They were together in Portland for four years before his wife filed for a separation in August 2011. They divorced on Aug. 23, 2012.

--

Mike Rogoway of The Oregonian contributed to this story.

--

;