Since the attack occurred, there have been questions about how James Holmes, the alleged murderer, was able to access an emergency door that allowed him to enter the theater. Could someone have opened the door for him?
Police aren't saying anything, but sources are telling Fox Denver that authorities are now actively searching for a "person of interest" who apparently knew Holmes, went to school with him, and may have assisted him in some way.
Sources tell FOX31 Denver reporter Justin Joseph that a second man is now a person-of-interest in the Aurora theater shooting investigation. We are not disclosing his identity because he has not been charged.
Twelve people were killed and 58 injured early Friday when James Egan Holmes allegedly opened fire inside the crowded theater.
Neighbors of the person of interest say for the past two days there have been SWAT team and police cars in their alley and unmarked cars in street.
"He's been there about a year," said one neighbor.
Agents showed up again this morning.
"I woke up this morning with cops still here trying to look inside his home. At 5:00 a.m. cops showed-up and asked me about (him)."
Sources tell Justin Joseph someone made either a call or a text from the person of interest's phone threatening violence if James Egan Holmes was not released from jail. That call prompted police to issue an alert to find and detain him.
Sources also say a picture of Holmes with red hair on an adult website is what Egan looked like when he was arrested.
Neighbors recognized him instantly but they say he recently dyed his hair.
"I've seen him before," said a neighbor to the person of interest.
The person of interest's Facebook page shows he has a master's degree in bio-medical science.
Anshutz Medical Center confirms he is in their doctorate program, the same program from which Holmes withdrew several months ago.
Out of caution police searched their campus Friday, but they won't say what if anything they were looking for or found.
As for the person of interest, all law enforcement jurisdictions, local, state and federal, are looking for him.
Neighbors say he and his roommate left their home hours before the massacre. They haven't seen him since.
It sounds like law enforcement has a pretty good idea that this "person of interest" either knows something or, considering the fire power they've surrounded his apartment with, that he may have been an active participant in the massacre.
Two crazies? Holmes may have been disturbed but what's this other guy's excuse, if indeed he had something to do with the massacre?