"What I'm saying now today is that I'm innocent and I had nothing to do with nothing these people are talking about," Clark said.
Clark was formally charged on Wednesday with felony contraband for having a homemade knife, or shank, in his Denver County Jail cell. He was moved from the federal penitentiary in Englewood to Denver last week.
"I got here Friday and Monday all of a sudden there's a spoon in my cell that they said was sharpened and [that I could] use it as a knife and I was never issued that spoon," Clark said.
Court documents indicate he had an "orange spoon that had been broken and sharpened into a cutting instrument (a.k.a. shank) in his cell."
Deputies reported they found it when they were searching several jail cells.
"It's a big deal because I'm in here and these people can do anything to me and what happened is now they're charging me for something else. What are they going to find next? They're going to say they found a gun in my cell," Clark said.
Clark says he's innocent of the charge of having a homemade knife in his cell.
"I was issued a white plastic spoon and a paper cup. That was it," Clark said, visibly upset.
Documents specify that the shank was made from an orange spoon.
"I wanted everyone to know how the people are treating me here," Clark said. "It's like, what's going to be next?"
Clark is accused in two high-profile murders in Denver.
He is charged in the December 2006 murder of Kalonniann Clark, who was killed only days before she was scheduled to testify in an attempted murder trial.
9NEWS Legal Analyst Scott Robinson says being accused of killing a witness is one of the most serious crimes in the justice system.
"The whole system comes to a crashing halt if witnesses are not safe," Robinson said.
Clark is also accused in the murder of Williams, who was killed in a drive-by shooting on New Year's Day 2007.
If convicted, Clark would get life in prison, and could possibly face the death penalty.
Clark says he still has visits from friends and family, phone calls, and privileges inside the jail. If he's convicted on the contraband charges, according to the sheriff's department, he could lose those privileges.
"That's not fair to me or my family," Clark said./>