As police completed work yesterday at the residence of a State College man charged with the homicide of a Penn State student, new details reveal that cocaine may have played a role in the late Thursday-early Friday incident last week.

The State College Police Department obtained a search warrant early Tuesday and used suspect Andrew A. Rogers' statement to validate a search of his residence at 224 Nimitz Ave. -- which resulted in the finding of 24-year-old Penn State student Youngcheol Park's body. Rogers, 28, was then charged with first- and third-degree murder.

According to new details in the probable cause affidavit, which was filed with the search warrant application, Rogers, Park and a man known only as "Sweet" were at Rogers' residence when Rogers and Park went into the basement of the residence to use a computer. When Rogers returned upstairs, "Sweet" was looking around his apartment.

The affidavit states "Sweet" asked him about purchasing cocaine. Rogers said he knew Park was a cocaine dealer, but Rogers refused to deal with drugs. "Sweet" then asked Rogers to borrow money. At that point, Park came upstairs, and a fight broke out, according to the affidavit.

In his statement, Rogers said Park and "Sweet" were going to steal his money. Rogers admitted to using a rolling pin and a baseball bat to hit both of them.

Rogers said "Sweet" and Park had a gun and pointed it at him. After using the baseball bat to strike at Park's face and head and to knock the gun out of "Sweet's" hands, Rogers said he blacked out.

Rogers said he awoke lying on Park. They were both covered in blood. Rogers checked Park's pulse, picked up a knife and looked around for "Sweet," but he was no longer in the house, according to the affidavit.

In his statement, Rogers said he was afraid and did not know what to do. He took off his clothing in the kitchen and vomited in the bathroom sink. He then left his house and fled town.

Several days later, on Monday evening, he walked into the Uniontown Police Department and told police there may be a dead man in his kitchen.

Uniontown police immediately contacted State College police who went to Rogers' residence. The door was locked and they looked through a kitchen window. They observed blood splatter on a doorway and a large blood splatter on the refrigerator door. Among the splatters, police saw an Asian male lying motionless with an "extreme" amount of blood near his head. The blood appeared dry and Park appeared to be in the first stages of decomposition.

Park's friend, Nicolas Warren (senior-international politics), said he started worrying about Park last semester because of his cocaine use.

Warren said he met Park a few years ago in a martial arts class, but Park didn't start doing cocaine until six or seven months ago.

"Our relations continued because we were two of the only dedicated Gung Fu practitioners on campus," he said. "We would work out together at the White building and work with weapons on Old Main lawn."

Warren said he worried about Park when he began to work out less last semester because he started doing more cocaine.

Warren also said he knew Rogers fairly well. He said he knew he was "into" doing cocaine for a while.

"When I found out about what [Rogers] had done I didn't believe it. I wouldn't imagine that he would do something like that," he said.

Warren said Rogers is a "pretty mellow" guy, but changes a "good amount" when he does cocaine.

"[Rogers] was a calm, rational dude -- with a coke problem. And that changes everything," he said.

Warren said he has witnessed both Park and Rogers using cocaine.

State College police confirmed yesterday afternoon they had contacted Park's parents, who live in South Korea.

State College Police Sgt. Mark Argiro said the police department had problems contacting his family until a reporter at the Korea Times in Los Angeles was able to find a contact in Seoul, South Korea.

State College police then contacted a police officer in Seoul, who helped translate the information to Park's family. They are now in the process of obtaining visas and paperwork to come to the United States, Argiro said.

Centre County District Attorney Michael Madeira said although the forensic technicians completed work at Rogers' house late yesterday afternoon, information on the evidence will not be released anytime soon.

He said the processing of blood and substances in the victim's system as well as a report on whether the substance found in the house is cocaine will take some time.

According to the search warrant, police seized materials related to controlled substances, specifically cocaine, drug paraphernalia, including cutting agents, packaging and weighing materials, and any and all firearms at the scene.

The police also applied to seize blood evidence; physical evidence, including hairs, the baseball bat, the rolling pin and the knife; bills and indications of residency; cell phones; computer hardware and software; written and electronic documents; and computer passwords.

Madeira also said he has nothing that he can release on the identity of "Sweet."

"We're still looking into whether there is a 'Sweet', people who may have the name 'Sweet' or even the nickname 'Sweet'," he said.

Madeira said that as of yesterday, Rogers' preliminary hearing is set for Thursday at the Centre County Courthouse.