INVESTIGATIVE CASE DOSSIER: THE 1973 GANNON & SNYDER MURDERS SOLVED: HOW FORENSIC DNA CRACKED 49-YEAR PENNSYLVANIA COLD CASE
- Victims: Maryann Gannon (Age 15) & Tina Snyder (Age 16)
- Date of Crime: 1973
- Location of Discovery: Pennsylvania
- Breakthrough Method: Forensic DNA testing and genetic genealogy
- Date of Resolution: 2022
- Status: Case officially resolved and perpetrator identified
In 1973, the double homicide of teenagers Maryann Gannon and Tina Snyder shocked Pennsylvania. For nearly five decades, investigators preserved microscopic evidence in police storage. In 2022, Pennsylvania State Police applied modern forensic DNA technology to crack the Gannon and Snyder murders, delivering long-overdue answers after 49 years.
The 1973 Double Homicide
Teenagers Maryann Gannon and Tina Snyder were murdered in Pennsylvania in 1973. Physical evidence was recovered and maintained by state police criminalists.
The DNA Breakthrough
In 2022, modern genomic analysis established the perpetrator’s profile, officially clearing the historic cold case.
Case Timeline & Key Forensic Milestones
| Date / Year | Milestone / Event | Forensic Significance |
|---|---|---|
| 1973 | Maryann Gannon and Tina Snyder murdered | Evidence preserved |
| 2022 | Forensic DNA identifies perpetrator | 49-year cold case resolved |
Frequently Asked Questions (FAQ)
How was the 1973 Gannon and Snyder case solved?
Pennsylvania State Police used modern STR DNA and genetic genealogy to identify the perpetrator from preserved evidence in 2022.
