A bloody footprint in the kitchen of the State College man charged with killing a Penn State student could belong to a currently unidentified third party known only as "Sweet."

Andrew Rogers, 28, is charged with first- and third- degree murder for the death of Youngcheol Park, 24, last February.

Rogers has continually stated that "Sweet" instigated the fight that led to Park's death. Authorities have not been able to locate "Sweet."

Casey McClain, Rogers' public defender, said the footprint is not Rogers' or Park's, but is currently being analyzed by the Pennsylvania State Police laboratory.

"It's something we are lucky we found because, even though we don't have to prove anything, it's reasonable doubt," McClain said.

Centre County District Attorney Michael Madeira has continually stated that he does not think "Sweet," as Rogers describes him, is real.

"The story is too convenient," he said.

Madeira said he is waiting until the footprint's analysis returns to make any official claim as to its source.

The photograph was submitted for analysis on Oct. 18., and authorities do not know when the analysis will return from the lab.