Detectives are trying to locate 38-year-old Bobbie Shay Crosby of Cypress. They've already arrested one suspect, 24-year-old Mark Ohls of Buena Park.
Investigators said the pair forced a man to go with them to an undisclosed location and hand over his ATM card and pin number.
Ohls is accused of withdrawing money while Crosby held the victim against his will.
The victim was stabbed several times before the suspects took off.
He was able to walk to the police station and was listed in stable condition.
Detectives tracked down Ohls and arrested him. He was booked at the Cypress City Jail on charges of attempted murder, robbery, kidnapping and conspiracy. He was later transported to the Orange County Jail with bail set at $500,000. Crosby remains on the run.
If you have any information regarding this incident, you're urged to call Cypress police at (714) 229-6600.