Jason Callahan ("Grateful Doe")

On the afternoon of June 26, 1995, a Volkswagen Vanagon traveling west on U.S. Route 58 near Emporia in Greensville County, Virginia, veered off the road and struck a pair of trees around 1:30 p.m. Both occupants were killed. The driver was identified as 21-year-old Michael E. Hager, but his passenger carried no identification and could not be named. Neither man had worn a seatbelt, and investigators, finding no drugs or alcohol in either body, concluded that Hager had likely fallen asleep at the wheel. The unidentified passenger died of acute head injuries suffered in the crash.

The young man was white, roughly 15 to 21 years old, about 5-foot-10 to 6 feet tall and 160 pounds, with brown eyes and long curly brown hair dyed a reddish tint. He had a star tattoo on his upper-left arm, a pierced left ear, and wore a beaded necklace. Found with the body were two Grateful Dead concert tickets dated June 24 and 25, 1995, a dollar in quarters, a lighter, and a handwritten letter signed by "Caroline T. & Caroline O." Neither Caroline was ever located. Because of the tickets and Deadhead memorabilia, the case became known as "Grateful Doe."

For nearly twenty years the young man's identity remained a mystery. His nickname and reconstructed facial images circulated online, and amateur investigators on Reddit and a dedicated Facebook page kept the case alive. In early 2015 a former roommate came forward, and photographs surfaced of a young man wearing clothing similar to the Doe's and closely resembling the reconstructions. The lead pointed to Jason Patrick Callahan, a Grateful Dead follower who had left the Myrtle Beach, South Carolina, area in June 1995. His mother, who had assumed he had estranged himself from the family, recognized him and formally reported him missing in January 2015.

Authorities collected DNA from Callahan's family, and samples were processed at a University of North Texas laboratory in a multi-agency effort involving the Myrtle Beach Police Department and Virginia officials. On December 9, 2015, DNA testing confirmed that "Grateful Doe" was Jason Patrick Callahan, born April 18, 1976, making him 19 at the time of the crash. Because his death was an automobile accident rather than a crime, no prosecution followed; the identification simply closed a two-decade mystery and returned a name to the young man. The case is frequently cited as an early example of internet sleuths and social media contributing to the resolution of a long-unidentified-remains case, and Callahan's remains were ultimately returned to his family.

The Grateful Doe case is frequently held up as a landmark in crowd-sourced investigation. After a forensic facial reconstruction was released, volunteers on Reddit and a dedicated Facebook memorial page pored over old concert photographs and missing-persons listings, and it was that online discussion that Callahan's mother ultimately encountered and recognized as her son. Some questions still linger around the edges of the case. The identity of the two women named Caroline who signed the letter found with Callahan was never established, and the precise circumstances of how he and driver Michael Hager came to be traveling together in the Vanagon that day were never fully documented. Even so, the identification gave a long-anonymous young man back his name after twenty years.