On this season of Missing Pieces, reporters Grace White and Matt Keyser are investigating the murder case of Sandra Melgar. She's serving 27 years in prison for the brutal murder of her husband, Jaime "Jim" Melgar, the night they celebrated their 32nd wedding anniversary. Why are there so many questions about her guilt?

On this episode: As crime scene investigators process the Melgar home, Sandra is taken to the police station to give a statement.That’s when detectives begin to suspect she’s the killer. For three hours they interrogate her about everything from the time she and Jim got home to when she woke up the next morning, tied up and bound in the closet.

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Read more: She's convicted of murdering her husband. Did she do it?

Watch: The murder case against Sandra Melgar

How this story was reported: Reporters Grace White and Matt Keyser spent months reviewing the case file, provided by the Harris County District Attorney’s Office. That was complete with original police reports, investigators’ notes and interrogation tapes, crime scene photos, and Jaime “Jim” Melgar’s autopsy report. White and Keyser spoke with prosecutor Colleen Barnett, who provided great detail about the state’s case against Sandra, and family members of Jim and Sandra, who provided valuable insight into their life and marriage.

If you have any questions or information about the case, email Grace and Matt.