Washington intern Chandra Levy disappeared in May 2001, launching an investigation that gripped the nation -- especially when Chandra's father alleged that she had been having an affair with then-congressman Gary Condit of California. (The congressman was never named an official suspect in Chandra's case.) Chandra's fate remained a mystery until May 2002, when her body was found in Washington's Rock Creek Park. But was she murdered -- and if so, who had killed her?

In May 2009, an illegal immigrant from El Salvador, Ingmar Guandique, was charged with Chandra's murder and later sentenced to 60 years in prison. In this clip from a new "Oprah: Where Are They Now?", Chandra's parents, Sue and Bob Levy, confess their true feelings about Ingmar's conviction. Sue recalls her experience in the courtroom during his sentencing. "I pointed my finger and asked him if he killed my daughter -- and I asked him to look at me," she recalls. "He says, 'No, I did not.'"

Chandra's mother also says that her own lingering questions about Chandra's murder make her wonder if Ingmar told her the truth that day. "I always think, 'I hope you got the right person,'" Sue says in the clip. "I have many, many… doubts about things because I have... lots of questions that remain unanswered to me."

It seems that the Levys aren't the only ones who might have unanswered questions: Recent developments in the case have sparked a re-examination of Ingmar's trial and conviction. "We can't really go into any detail about it," says Bob. "It's just, they're just checking some things out. Doesn't mean that he's not guilty. Or doesn't mean that there'll be another trial."

In the past, Chandra's parents alleged that Congressman Condit knew more about their daughter's disappearance than he had revealed to the authorities. Do they still hold that belief? Sue remains mum. "I have to be careful what I say because I don't want a lawsuit," she says in the clip.

Watch the full episode of "Oprah: Where Are They Now?" with the Levys, Ryan White's mom and more on Sunday, April 21, at 10 p.m. ET on OWN.

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  • Chandra Levy Murder

    Chandra Ann Levy, a government intern, went missing in Washington, D.C. in May, 2001. The 24-year-old University of Southern California student had been interning with the Bureau of Prisons for seven months before she disappeared.

  • Chandra Levy Murder - The Parents

    Levy's parents, Robert, right, and Susan, announced their campaign to upgrade their daughter's status beyond that of a missing person June 21, 2001 at the Watergate Hotel in Washington, DC.

  • Chandra Levy Murder

    Washington, DC. police distributed these images of Levy on July 13, 2001 showing what she could look like with different hair styles.

  • Chandra Levy Murder - The Affair

    US Congressman Gary Condit, D-CA, was under intense scrutiny in the Levy case, after Levy's father, Robert Levy, told police <a href="http://news.blogs.cnn.com/2010/10/26/chandra-levys-father-testifies-about-her-affair-with-condit/">he believed his daughter had been having an affair with the congressman</a>. The congressman said he had not heard from Levy in over a week, when police questioned him on May 8, 2001. His apartment was searched on July 9, 2001, where <a href="http://www.washingtonpost.com/wp-srv/metro/specials/chandra/ch8_1.html">his affair with Levy was confirmed</a>.

  • Chandra Levy Murder - The Search

    Police searched Rock Creek Park in Washington, DC. for Levy on July 16, 2001. Investigators saw in <a href="http://news.google.com/newspapers?id=DQBJAAAAIBAJ&sjid=2IIMAAAAIBAJ&dq=chandra%20levy%20laptop&pg=3598%2C66681">Levy's laptop history</a> that, on the day she disappeared, she'd looked up a "map site" for the Klingle Mansion in Rock Creek Park, The Vindicator reported.

  • Chandra Levy Murder - 1 Year Later

    Kristinn Taylor attends a candlelight vigil marking the one-year anniversary of Levy's disappearance outside Levy's apartment building May 1, 2002 in Washington, DC.

  • Chandra Levy Murder - Remains Found

    Levy's remains were not found until May 2002. <a href="http://articles.cnn.com/2002-05-22/us/levy.body_1_chandra-levy-heartfelt-sorrow-and-condolences-levy-family?_s=PM:US">She was identified through dental records</a>, CNN reported.

  • Chandra Levy Murder - Memorial

    In this photo a family friend of the Levy's wipes her eyes before a memorial on May 28, 2002 in Modesto, California.

  • Chandra Levy Murder - Suspect Named

    Ingmar Guandique became a suspect in the Levy case after being arrested for allegedly attacking two women, Halle Shilling and Christy Wiegand, on May 14, 2001 and July 1, 2001, respectively, in the same park where Levy's body was found. On July 2, after being shown a photograph of Levy, Guandique told police he'd seen her in the park but did not attack her.

  • Chandra Levy Murder - Ingmar Guandique

    On August 26, 2001, <a href="http://www.washingtonpost.com/wp-srv/metro/specials/chandra/ch10_printer.html">a jailhouse informant told police that Guandique confessed to killing Levy</a>. On May 19, 2009, Guandique was <a href="http://www.washingtonpost.com/wp-srv/metro/pdf/GuandiqueArrestWarrant.pdf">indicted for first-degree murder</a>.

  • Chandra Levy Murder - The Trial

    Nine years after her murder in Washington, DC, jury selection began in the case. The trial began on October 18, 2010.

  • Chandra Levy Murder - The Verdict

    The <a href="http://voices.washingtonpost.com/crime-scene/chandra-levy/levy-death-trial-jury-delibera.html">jury began deliberations</a> on November 15, 2010. Guandique was convicted of two counts of first-degree murder on Nov. 22.

  • Chandra Levy Murder - The Sentence

    On February 11, 2011, a D.C. Superior Court judge sentenced Guandique to 60 years in prison.