| Crime | In 1979, 23-year old Catherine Walsh was found dead in her home. She was bound with rope and strangled by bandana. |
| Evidence | The case went unsolved for 40 years. It was reopened when DNA evidence was found on Walsh’s bathrobe. |
| DNA | A crime lab developed DNA mixture data from the bathrobe and other items found at the crime scene. |
| Match | The manual methods used by the crime lab could not draw any conclusions from the evidence. |
| TrueAllele | The computer separated the old DNA and helped explain the evidence. |
| Cybergenetics | In November of 2013, Dr. Mark Perlin testified about the DNA evidence and possible transfer in a Beaver county courtroom. |
| Outcome | In 2013, Hopkins was found guilty of third degree murder and sentenced to 8-16 years in prison. In 2022, Hopkins was exonerated. |
Media
- Gregory Scott Hopkins' First Wife Described a Troubled Marriage Beaver Countian
- Pennsylvania Councilman Charged in Lover's 1979 Death ABC News
- Republican politician to stand trial for 1979 murder of 23-year-old lover after DNA evidence found on victim's nightgown Daily Mail
- Ex-councilman gets 8-16 years for 1979 Beaver Co. murder WPXI
- Victim's family shares decades of devastation; Hopkins sentenced up to 16 years in prison Elwood City Ledger
- Man convicted in Monaca cold-case homicide asks court for new trial The Times
- Court upholds murder conviction of former Bridgewater councilman Trib Live
- CBS 48 Hours reports DNA evidence in “Janet’s Secret” Television Episode
- Justice denied: Mr. Hopkins invisible semen Cybergenetics Presentations
- Pennsylvania Superior Court grants Hopkins new trial Cybergenetics Newsroom
- Charges dismissed, Gregory Hopkins exonerated National Registry of Exonerations