"When I opened the door, I heard very big screaming, my daughter screaming," said the father, who only wished to be identified as John.
John came home from work around 3 a.m. to the screams of his 18-year-daughter coming from her bedroom. He opened her door and turned on the light and was horrified by what he saw.
"I saw the guy, the guy sitting on my daughter's bed," he said.
At that point, he said the suspect waved a knife, threatening John and his daughter as he ran out of the bedroom to escape out the front door.
John said he grabbed part of a disassembled bed frame and used that as his weapon.
"I had no choice, I had to fight," John said.
Authorities believe the suspect used an alleyway to gain entrance to the backyard of the home on the 600 block of Monterey Road. Then he walked around to the side of the house where he used a knife to cut the screen of the victim's bedroom window. John said the window was not locked at the time.
John said when the suspect couldn't flee through the front door the man ran back into his daughter's bedroom and escaped through the same window. John searched outside his home, but the man was long gone. At that point, John's only concern was for his family.
John said his daughter is recovering from the incident.
"She's ok, at the time she was very upset. Now she's ok," he said.
The South Pasadena Police Department said forensic experts have recovered physical evidence from the scene and they want the public to be aware that the sexual predator is still on the loose.
"We've called Los Angeles County Sheriff's Department's bloodhound unit for scent evidence tracing and we've had some successful leads with that I can't divulge at this time," said South Pasadena Police Officer Matthew Ronnie. "But we are taking this of the utmost importance."
The suspect is described as a white man between 40 and 50 years old, with brown eyes and curly dark brown hair. He is between 5 feet 11 inches tall and 6 feet 1 inch tall and weighs 180 to 200 pounds. He has facial hair and was wearing a red hooded sweatshirt.
Anyone who has seen the suspect is asked to call the South Pasadena Police Department at (626) 403-7270.