OKLAHOMA CITY - Police continue to search for a missing Oklahoma City woman, investigators believe is deceased. 

Susan Freehauf's family has been notified she is missing and a victim of homicide.

Her co-workers feared for her safety when she did not report to work for two days. She was reported missing on Monday by her employer. They say she was a trainer for United Airlines.

A former co-worker is shocked Freehauf is missing and likely dead.

“If what we’re thinking is true,” said Robert Lockart, former co-worker. “My prayers and thoughts go out to her family and of course her.”

He did not know much about Freehauf's personal life but cannot imagine why someone would harm her.

“She was a great person,” said Lockart. “Is a great person. I don’t even know how to say that.”

Witnesses said Freehauf and her boyfriend, David Shores lived together.

Detectives searched their apartment and found large blood stains on the carpet and pad and attempts to clean blood from the walls, carpet and clothing.

The investigation then took detectives to a storage unit near Northwest 10th Street and Meridian Avenue. Employees of the storage company say police had a search warrant but would not identify the owner of the storage unit.

“Based off of developing information,” said Officer Megan Morgan, Oklahoma City Police Department. “Homicide investigators were able to get enough information for an arrest warrant for murder against David Shores.”

Prior to the murder warrant, police arrested Shores after he was seen driving Freehauf's car. Police said he also used her debit card to withdraw cash from an ATM.