Three years after an immigrant from El Salvador was found guilty of the 2001 murder of Washington intern Chandra Levy, a judge is holding secret hearings on new information that may undermine the conviction, CBS This Morning reports.

Court records show that the hearings have been taking place behind closed doors, and neither prosecutors nor defense lawyers have revealed the purpose of the sessions. The next hearing is scheduled for on Feb. 7.

Ingmar Guandique, 30, was sentenced to 60 years in prison after being convicted in 2010 of killing Levy, whose remains were found in Washington's Rock Creek Park. The case relied largely on testimony from an inmate who served time in prison with Guandique.

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