Ryan Reynolds

Police run the DNA found at the crime scene through the National Law Enforcement Database. but there is no match. Investigators begin reading through everyone she knows.

Ultimately, both Principal Goodman and Christy's married boyfriend provide airtight alibis and are cleared. The suspect list grows shorter and shorter.

Ultimately, both Principal Goodman and Christy's married boyfriend provide airtight alibis and are cleared. The suspect list grows shorter and shorter.

Weeks turn into months. Months into years.

Weeks turn into months. Months into years.

She calls reporter Barbara Hoffroda to give one final newspaper interview pleading for answers.

She calls reporter Barbara Hoffroda to give one final newspaper interview pleading for answers.

What did you say to her?

What did you say to her?

amazingly the young student who lived through the trauma of losing her teacher good evening is now all grown up and a reporter covering the cold case this is the school where christy marack or miss marack as she was known to her students never showed up the day she was murdered she says her teacher's murder influenced her decision to become a reporter i think her death really did shape a lot of us in ways that we didn't even know

amazingly the young student who lived through the trauma of losing her teacher good evening is now all grown up and a reporter covering the cold case this is the school where christy marack or miss marack as she was known to her students never showed up the day she was murdered she says her teacher's murder influenced her decision to become a reporter i think her death really did shape a lot of us in ways that we didn't even know

Trying to keep his sister's case front and center, Vince leases a giant billboard next to the highway.

Trying to keep his sister's case front and center, Vince leases a giant billboard next to the highway.

Flash forward, two decades after the murder, District Attorney Craig Stedman's office takes over the cold case.

Flash forward, two decades after the murder, District Attorney Craig Stedman's office takes over the cold case.

Coming up, a DNA revolution allows them to stare into the face of a killer. What was it like to look at a sketch of a person who potentially raped and murdered your sister? And a break in another famous cold case would lead to a breakthrough in this one.

Coming up, a DNA revolution allows them to stare into the face of a killer. What was it like to look at a sketch of a person who potentially raped and murdered your sister? And a break in another famous cold case would lead to a breakthrough in this one.

Across the country in California, a former actress and singer is also watching with keen interest.

Across the country in California, a former actress and singer is also watching with keen interest.

Her name is Cece Moore, and she is now a genetic genealogist.