Police are looking for a man who a witness allegedly spotted with missing Penn State student Cindy Song in the Philadelphia area around the time of her disappearance.

After reporting a Song sighting, the witness was hypnotized to develop a composite sketch of a man allegedly seen with the 21-year-old around Halloween. Because of conflicting stories, police do not consider the man a suspect in the case.

The man is of Asian or Middle Eastern descent and is described as medium height, medium weight and having medium-length hair, according to a news release from the Ferguson Township Police Department. He has an olive to light brown skin complexion and is reportedly driving a light-colored, four-door vehicle that is possibly an American car.

The man is not suspected of holding Song against her will because of the conflicting stories, Ferguson Township Det. Brian Sprinkle said. That Song is definitely the woman who the witness saw with the man also is not definite, Sprinkle said.

"This is just from a report of this witness calling in and thinking that she saw Cindy Song," Sprinkle said. The witness reported the sighting around Halloween, he said, and the hypnosis was conducted last week.

While hypnosis is not commonly used in investigations, Sprinkle said, "It definitely has been use in law enforcement investigations in the past."

Song was last seen in the early hours of Nov. 1, after spending the night at a Halloween party. A friend last saw the 5'1", 115 lb. Korean woman entering her State College Park apartment wearing a short white skirt, pink top, knee-high brown boots and red-hooded coat.

Since the investigation began, family members have come from Korea to help find Song and pressure the speed of the investigation.

Recently, Penn State students, alumni and community members joined the Song family in voicing concerns that the police were not doing enough to find Song.

Sprinkle responded to reports that the case might soon be marked "inactive," and said the case will always be active, but when the leads start to dry up, the investigators will stop working on the case every day.

"When the time comes that we've exhausted all leads . . . it will not be investigated daily," Sprinkle said. "The case will remain open and active as long as Cindy Song is still missing."

Anyone recognizing the individual in the composite and with any information about him and/or Song's disappearance is asked to call the Ferguson Police at 237-1172 or (800) 479-0050.