REVEALED: Harrowing 911 call from witness who saw Las Vegas sicko 'eating dead victim's face'

A witness who saw a crazed cannibal chewing the flesh of a man’s face in Las Vegas made a harrowing 911 call asking for police to intervene.

Colin Czech, 29, is accused of eating Kenneth Brown’s ear and eyeball after bashing him to death in a 7-Eleven car park on April 28.

He has been charged with murder after police allegedly found him covered in blood and kneeling above the man's mutilated head.

A convenience store employee called the police to report a man was on top of another at a bus stop ‘eating’ his face.

‘It’s bad, ma’am,’ the worker said in the 911 call obtained by 8 News Now. ‘Oh my God — I don’t what the f*** he’s doing to this man, that’s some weird s***.’

A witness who allegedly saw Colin Czech chewing the flesh of a man’s face in Las Vegas made a harrowing 911 call asking for police to intervene

The 29-year-old homeless man is accused of eating Kenneth Brown’s ear and eyeball after bashing him to death in a 7-Eleven car park on April 28

Another desperate employee called 911 just before 5am on Sunday and claimed Czech was standing outside the store ‘all night’ and jumped on a customer.

‘I guess he just rushed him,’ they told the dispatcher. ‘I tried to have a conversation with him and he won’t talk.’

‘Right now, he’s on all fours like he’s a dog about to rush the store. I guess he just rushed him. I need somebody to come get him now.’

Czech admitted to police he 'used his teeth to eat [the victim's] eyeball and ear', an arrest report alleged.

Police claimed the homeless man murdered Brown by repeatedly bashing his head on the concrete, causing his death from severe head injuries.

Authorities arrived and were horrified to allegedly find Czech with blood and 'biological matter' on his face, hands, mouth, and clothing.

Brown was unresponsive and bleeding from his head and was missing his left ear and left eye.

Czech admitted to police he 'used his teeth to eat [the victim's] eyeball and ear,' his arrest report alleged

 911 call claimed Czech was 'eating the face of the male on the ground' at a nearby bus stop, and police arrived to find him kneeling over the victim and covered in blood

Chief deputy public defender David Westbrook (pictured) told the court Czech was insane and was granted a competency hearing on May 24

Czech was 'kneeling on the ground' next to Brown's head and when cops asked what happened, he 'gave a blank stare' and didn't say anything, authorities said.

He was taken to hospital as he was 'going in and out of consciousness', while Brown was pronounced dead on arrival.

Czech is said to have told detectives he was homeless and hadn't slept for five nights in a row because something was 'possessing him.'

He allegedly claimed Brown 'attacked him' and he thought he was fighting a 'shape-shifter' but was helped to victory by a 'higher power.'

Voices in his head told him to kill a person called Drake, whom he didn't know and thought it was Brown, he allegedly told police. Czech also said he was 'tweaking.'

When asked what he used to attack Brown, he allegedly said 'my teeth' and that he 'he used his teeth to eat [Brown's] eyeballs and ears.'

Czech faced Las Vegas Justice Court on Wednesday where he made bizarre facial expressions and his lawyer argued he was too insane to stand trial.

Chief deputy public defender David Westbrook told the court Czech was insane and was granted a competency hearing on May 24.

'I've spoken to him, and I've determined that he is incompetent,' he said.

'We will get to the bottom of all the factual allegations, that is a process. But before we get there we have to go into the competency proceedings.'

Should the hearing determine Czech is too mentally incompetent to stand trial, he would be sent to a mental institution for treatment until that changed.

Czech was remanded in custody without bail and is behind bars at Clark County Detention Center.

The 7-Eleven parking lot is at 1100 S Las Vegas Boulevard, steps from the famous Haunted Museum and Little White Chapel.