Long Island is home to several enduring cold cases, with the disappearance of two-year-old Steven Damman in 1955 standing as the region's oldest unsolved missing persons case. On October 31, 1955, Steven, then just two years old, vanished from an East Meadow shopping strip near his home, triggering one of the most intensive street-by-street searches in Nassau County history. His mother, Marilyn Damman, reported to police that she had left Steven and his infant sister, Pamela, in a carriage outside a Food Fair supermarket. Upon her return approximately ten minutes later, both children were gone. A neighbor soon located the carriage with Pamela nearby, but Steven, described as weighing 32 pounds, just over 3 feet tall, and wearing a red sweater with white and blue ships, was nowhere to be found. This incident launched a massive, dayslong search involving thousands of officers and volunteers, with his father, Airman Jerry Damman, even extending his military enlistment to aid in the effort.

The initial investigation provided a window into suburban life on Long Island in the 1950s. While Marilyn Damman stated that leaving children in carriages outside stores was a common practice she had done "a thousand times," police documents later revealed that investigators confronted her with doubts about her story. Early leads in the case often proved fruitless; for instance, a ransom note demanding $3,000 sent to the Dammans was likely a hoax. A significant aspect of the early investigation focused on a witness account from Philena Potter, who claimed to have seen a Black man pick up a little boy near the carriage. This led to years of police questioning Black individuals with white children across the tristate area and beyond. However, this account, which was later detailed further by Potter's daughter, was eventually "discounted" by both police and Marilyn Damman, who believed her son was taken by a woman who had lost a child of her own.

The dragnet for Steven also extended to hundreds of families, including those who had experienced stillbirths, lost boys in the years prior, or adopted boys afterward, on the theory that Steven might have been taken as a replacement. Police pursued tips, no matter how implausible, interviewing psychics and even searching a neighborhood in the Bronx based on a woman's claim of receiving "messages out of the air." One early disappointment involved a boy found wandering alone in a New York City variety store in November 1955, whose resemblance to Steven was so striking that Jerry Damman was taken to view him, only to confirm it was not his son.

As the investigation progressed, suspicion began to turn towards Marilyn Damman. Police interviewed two women who reported witnessing Marilyn beating Steven, with one recounting hearing slaps and the boy crying, and another claiming to have seen Marilyn strike Steven about the face, head, and chest. An air base chaplain confirmed multiple complaints about Marilyn's treatment of Steven. Steven's medical history, which included a broken arm from a fall, a chin cut, and a ruptured eardrum from an object stuck into it, was also reviewed, although police documents provided no explicit assessment of potential abuse. By November 1957, investigators explicitly told Marilyn Damman that "the facts of the case indicate that she is the one that is responsible for the disappearance of Steven," citing her perceived lack of interest in efforts to find him and unnatural grief. Marilyn consistently denied any involvement. Steven's sister, Pamela Sue Horne, has not been reached for comment, and the documents do not address Marilyn's treatment of Pamela beyond a neighbor's passing observation that she "cuddled" her.

Seventy years later, Steven Damman remains missing. He would be 72 if still alive, and the National Center for Missing and Exploited Children maintains an age-progressed image of him as a 65-year-old. Despite DNA evidence disproving a Michigan man's 2009 claim to be Steven, and modern forensic tools like surveillance cameras and digital records being unavailable in 1955, the case remains an active, ongoing investigation for both Nassau police and the National Center. Experts like Joseph Giacalone, a retired NYPD commander, emphasize the difficulty of solving such cases without forensic evidence, though cadaver dogs and ground-penetrating radar could potentially aid new searches.

Beyond Steven Damman, Long Island has been marked by other tragic disappearances that have spurred extensive searches and left families without closure. Barbara Lane, 38, vanished on August 5, 1990, after leaving her Franklin Square home for work. Despite police efforts, she was never found and was declared legally dead in 2020. Similarly, Norine Higuchi Brown, 31, disappeared on December 12, 1990, after driving to a Pathmark store in New Hyde Park for Christmas items. Her car was found the next day, but she was gone, leaving behind her ID and wallet. Declared dead in 2001, her friends continue to push authorities to keep her case active.

More recently, George Richardson, 50, disappeared on August 28, 2012, during a family vacation in Montauk, presumed to have gone for an early swim in rough surf. His body was never found, and he was declared dead in 2022. Robert Mayer, a 46-year-old electrician, went missing on June 14, 2013, after leaving his Dix Hills home for work. His car was found at an LIRR station he didn't typically use, and he was declared dead in 2022, with police believing no foul play was involved. Michael George O’Brien, an unemployed builder suffering from depression, disappeared on December 28, 2014, from Greenport after an argument. His truck was found at the Cross Sound Ferry, and surveillance showed him walking towards the waterfront, never to return. He was presumed deceased in 2019.

The most recent of these notable cases is Peter Farrell, 72, an expert sailor who embarked on a voyage from Fire Island to the British Virgin Islands on October 13, 2019, with his dog, Sunny, on his sloop, the Blue Dog. Despite being equipped with an emergency device, no distress signal was received amid reports of rough weather. A vast search by the U.S. Coast Guard covering over 310,000 square miles yielded no trace. His sister, Adrienne Tesoro, continues to send him text messages, highlighting the enduring pain and hope that characterize families of the missing. These cases underscore the profound and lasting impact of unexplained disappearances, leaving families and communities in a perpetual state of uncertainty and longing for answers, even decades later.