WASHINGTON (CNN) -- The Salvadoran immigrant suspected in the 2001 slaying of Washington intern Chandra Levy told at least two people he killed her, according to an affidavit filed in the case. Ingmar Guandique is serving a 10-year sentence for two assaults in the park where Chandra Levy's body was found. Ingmar Guandique, 27, also kept a magazine photo of Levy in his prison cell, stated the affidavit detailing evidence supporting a warrant for his arrest for first-degree murder. Guandique is in prison in California for two assault convictions. Guandique boasted of his ties to the violent Salvadoran gang Mara Salvatrucha, or MS-13, and told witnesses that he was known as "Chuckie" -- the name of a demonic doll in a series of horror movies -- because he had a reputation for "killing and chopping up people," the affidavit states.
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NEW: Affidavit says suspect kept a magazine photo of Chandra Levy in prison cell
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NEW: Witnesses say suspect known as "Chuckie," like demonic movie doll
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An arrest warrant for Ingmar Guandique was signed Tuesday
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Levy disappeared in May 2001; her body was found a year later
Authorities said Guandique will be brought to @placeholder in the next 45 to 60 days and formally charged, ending a chapter in one of Washington's most notorious cold cases.