Originally Posted by Wikipedia

On June 13, 2001, Jolkowski was called into work early. He planned to walk to his job due to his car being at an auto repair shop, but later made arrangements for a co-worker to give him a ride. Since Jolkowski had trouble giving directions, he arranged for them to meet at Benson High School, which Jolkowski had previously attended. The school was eight blocks from his home.

At 10:45 a.m., Jolkowski was last seen by a neighbor, who witnessed him helping his younger brother pull trash cans from the curb back to the house. Under an hour later, between 11:15 and 11:30 a.m., his co-worker called his house stating that he had failed to turn up at Benson High for the ride to work. Jolkowski has not been seen or heard from since then. Shortly after his disappearance, the school's security cameras were checked, but none of them showed Jolkowski arriving at the school.

A police officer investigating his disappearance deemed it "the most baffling case" he had seen in thirty years.

Originally Posted by Wikipedia

On Tuesday, September 20, 1988, Calico left her home at about 9:30 A.M. to go on her daily bike ride along New Mexico State Road 47. She rode that route almost every morning and was sometimes accompanied by her mother, Patty Doel. However, Doel stopped riding with Calico after she felt that she had been stalked by a motorist. She advised Tara to think about carrying mace, but Tara rejected the idea.

On the morning of Calico's disappearance, she had told Doel to come and get her if she was not home by noon, as she had plans to play tennis with her boyfriend at 12:30. When her daughter did not return, Doel went searching for her along Tara's usual bike route but could not find her; she then contacted the police. Pieces of Calico's Sony Walkman and a cassette tape were later discovered along the road. Doel believed that she might have dropped them in an attempt to mark her trail.

Several people saw Calico riding her bicycle, which has never been found. No one witnessed her presumed abduction, although several witnesses observed a light-colored pickup truck (possibly a 1953 Ford) with a camper shell following closely behind her.

Originally Posted by Wikipedia

On June 15, 1989, a Polaroid photo of an unidentified young woman and a boy, both gagged with black duct tape and seemingly bound, was discovered in the parking lot of a convenience store in Port St. Joe, Florida. The woman who found the photo said that it was in a parking space where a white windowless Toyota cargo van had been parked when she arrived at the store. She said that the van was being driven by a man with a mustache who appeared to be in his 30s. Police set up roadblocks to intercept the vehicle, but the man has never been identified. According to Polaroid officials, the picture had to have been taken after May 1989 because the particular film used in the photograph was not available until then.

The photo was broadcast on A Current Affair in July, and Doel was contacted by friends who had seen the show and thought the woman resembled Calico. Relatives of Michael Henley, also of New Mexico, who had disappeared in April 1988, saw the episode and said that they believed he was the boy in the photo. Doel and Henley's parents both met with investigators and examined the Polaroid. Doel said that she was "convinced" it was Calico. She also noted that a scar on the woman's leg was identical to one that Calico had received in a car accident. In addition, a paperback copy of V.C. Andrews' My Sweet Audrina, said to be one of Calico's favorite books, can be seen lying next to the woman. Scotland Yard analyzed the photo and concluded that the woman was Calico, but a second analysis by the Los Alamos National Laboratory disagreed. An FBI analysis of the photo was inconclusive.

Henley's mother said that she was "almost certain" it was Michael in the Polaroid. The identification of the boy in the photograph as Henley is considered highly unlikely: his remains were discovered in June 1990 in the Zuni Mountains, about 7 miles (11 km) from his family's campsite from which he had disappeared and 75 miles (121 km) from where Calico disappeared. Police believe that Henley wandered off and subsequently died of exposure.

Originally Posted by Wikipedia

On June 30, 2014, 28-year-old Lars Mittank traveled to the seaside resort of Golden Sands, Bulgaria on a vacation with a group of friends. On July 6, 2014, Mittank got into a fight with four other men after a disagreement over football: Mittank, a fan of the football club Werder Bremen, had differences with fans of Bayern Munich. The fight resulted in Mittank suffering a ruptured ear drum. At the end of his trip, a doctor advised Lars not to fly due to his injury, and prescribed the antibiotic Cefuroxime (500 mg). That doctor later referred him to a hospital. Mittank's friends wanted to stay with him, but he insisted he was fine on his own.

Mittank stayed in Bulgaria without his friends, and checked into the Hotel Color Varna. However, a day after his friends left, Mittank began to act oddly, and his erratic behavior was recorded by the hotel's closed-circuit television security cameras. He spent only one night in the hotel, during which he appeared paranoid and frightened.

While at the hotel, Mittank called his mother. In a whisper, he stated that four men were coming to kill him, and that she should cancel his credit cards.

Mittank was last seen at Varna Airport, the airport that serves Golden Sands in the nearby city of Varna. He was consulting with the airport doctor when they were interrupted by a man who was a part of a construction crew. He then fled the building. He was captured by airport security cameras running away. Once outside the airport, he was seen climbing a fence, running into a meadow, and disappearing into an adjacent field of sunflowers near Bulgarian national highway A2. He has not been seen since.