A month has passed since the brutal beating in a State College residence, and police are still trying to determine whether a third person was involved in a fight that ended in the death of a Penn State student.

Andrew A. Rogers, 28, who turned himself in to police on Feb. 27 and is facing first-, second- and third-degree murder charges, told police a man only known to him as "Sweet" was also involved in the incident that resulted in the death of Youngcheol Park, 24.

Centre County District Attorney Michael Madeira said law officials are still uncertain if "Sweet" is a real person or if he was, in fact, only made up by Rogers.

"We've followed every little tip that we've received, but nothing has panned out," he said.

Madeira said the State College Police Department has tried looking at people with Sweet in their name or anyone who may have the nickname "Sweet," but the pool of possibilities is trickling down.

In Rogers' statement to police, he said, Park asked if "Sweet" could go to Rogers' residence at 224 Nimitz Ave. Rogers agreed, even though he had never met "Sweet."

While at the house, Rogers said "Sweet" was looking through about $850 of Rogers' in the living room. Rogers said he retrieved the cash, and "Sweet" said if he really wanted the money, he would just steal it. "Sweet" repeatedly asked Rogers to borrow money or buy cocaine with it, according to court documents.

In his statement, Rogers said he was sitting on the couch using cocaine with Park when "Sweet" tried to put a plastic bag over his head. Rogers said he then grabbed a rolling pin between the couch cushions and a fight ensued.

The fight escalated after Park joined in and Rogers put a garbage bag over Park's head and used a bottle and baseball bat to hit him. Rogers said he also struck "Sweet" numerous times with the baseball bat.

Rogers then said that he saw Park pull a gun barrel from his backpack and that Rogers struck him with the bat, causing him to drop the gun.

According to the criminal complaint, Rogers said he saw "Sweet" take cocaine from Park's backpack. After Park was struck and lying on the kitchen floor with Rogers over him, "Sweet" picked up the gun, pointed it at Rogers and fled.

Rogers said he awoke sometime later lying on top of Park's body. He said he changed clothes, packed a suitcase and took Park's wallet, which contained about $250 cash, from his pocket before leaving.

Despite the fact that there may be someone with a gun at large, residents of State College should not be concerned, he said.

"This guy obviously wants to lay low and not be identified," Madeira said. " 'Sweet' is not an issue, and the gun is not an issue that people should be worried about."

Madeira said results from blood samples taken from the scene have not been released.

According to the search warrant and inventory of items seized, police found bloody clothes, bloodstained carpet and blood on flooring, walls and appliances, as well as cocaine and razor blades.

The samples may possibly help determine if there was a third person involved in the fight that night, Madeira said.

"It takes a while for these things to be processed," he said. "It's not like on TV."

Madeira said if "Sweet" exists and is found, he would have to look at the facts and listen to his version of what happened that night to see what possible charges "Sweet" would face.

"It's hard to tell what kind of involvement 'Sweet' had in this if we don't have his side of the story," Madeira said. "If he does exist, I'm sure he's paying attention to the news and seeing what the defendant is saying about the incident."

Madeira said his opinion on the existence of "Sweet" will not come out until after the preliminary hearing, which is scheduled for April 4.

"It's not appropriate to reveal my ideas at this time," Madeira said. "I don't know what position the defendant will be taking."

According to Rogers' statement to police, "Sweet" was a white man with a dark or olive complexion, in his early to mid-20s, standing between 5 feet 8 inches and 5 feet 10 inches tall, with brown, neatly trimmed hair and sideburns.