This man was found dead at a beach in Ireland in 2009. Years later, even Interpol does not know who he was!

Often, people die a lonely death, unknown to their friends and family, either on a work trip, or on holiday, or even at war. However, eventually their families are traced, and members are often given a chance to say their final goodbyes before the cremation. However, what would happen if a man died, yet nothing on him is ever found, even by the Interpol? This is the story of Peter Bergmann...

The Peter Bergmann case centers on the unexplained death of an unidentified man in Sligo, County Sligo, Ireland, around June 16, 2009. Registering at the Sligo City Hotel on June 12 under the alias "Peter Bergmann," his activities were recorded on CCTV, yet his motives and background remain unknown.
What actually happened?
On the morning of June 16, 2009, the man's body was found at Rosses Point beach near Sligo. Despite a five-month investigation, no one couldn't identify the man or find any leads. The man used the alias Peter Bergmann, paid in cash, and gave a fake address in Austria. He had a German accent and arrived in Sligo from Derry, Northern Ireland. CCTV footage showed Bergmann leaving the hotel multiple times with a purple plastic bag that appeared to contain items he was disposing of, and he seemed to avoid surveillance cameras.

Suffering from many medical conditions
The autopsy revealed that Peter Bergmann suffered from advanced prostate cancer, bone tumors, and ischaemic heart disease, but no drugs were found in his system.
Various theories
Theories suggest he may have been a spy, a fugitive, or terminally ill and seeking an anonymous death. The case gained renewed attention with the 2013 documentary, The Last Days of Peter Bergmann. Interpol was unable to identify him, and his DNA, dental records, and remains are stored by Irish authorities, awaiting a match that may never come. The case is often compared to the Tamam Shud case in Australia.
Several theories attempt to explain the identity of Peter Bergmann:
Intelligence Officer/Gangster on the Run: Some speculate that Bergmann was either an intelligence officer or a gangster trying to escape authorities.

Child of a Nazi Criminal: Another theory suggests he was the child of a Nazi criminal attempting to conceal his identity.
Extraterrestrial: A more outlandish theory posits that he was an extraterrestrial "lost" on Earth.

Terminally ill seeking anonymous death: It is also theorized that he may have been terminally ill and wanted to find a scenic place to die anonymously. He likely thought his body would be washed out to sea.
Military/Law Enforcement Background: Given his methodical means of disposing of his belongings out of the public gaze, it's thought that he came from a military or law enforcement background. But one will never know...