The
Gardaí started a search of the surrounding area and drained a lake behind her grandparents' house. They also created a filmed reconstruction of the disappearance in which Ann was used as a stand-in for her twin sister. In 2008, the Irish public broadcaster
RTÉ broadcast a documentary programme about the case. Over the intervening years, the performer
Margo, a friend of and relation to the family, has funded searches on the surrounding hillsides in an effort to try and locate Boyle's body. Police searches have also taken place since 1977, with the latest taking place in 2016 when Gardaí launched a new investigation. However, no evidence has been found. The investigation into Boyle's disappearance has attracted some publicity because of allegations of political interference which centred around the accusation that a politician phoned the Gardaí and told them to not question or detain their main suspect. Margo was said to have walked up to the politician who was accused of making the call in 1977 and asked if he had done so. According to Margo, he said "[that it] was untrue and called me a bare-faced liar." The length of time that Boyle has been missing, and allegations of official involvement, led
The Guardian to label the case "Ireland's
Madeleine McCann." Boyle's disappearance is now the longest-running missing child case in modern Irish history, and despite the publicity it attracts, it has not been debated in the
Dáil. The case was raised by
Lynn Boylan MEP in the
European Parliament, where she highlighted the lack of direction in the investigation. In 2018, relatives and supporters of Boyle's family held a silent protest outside the coroner's office in
Stranorlar. The protest was intended to pressure the coroner to hold an
inquest into Boyle's death which would allow key witnesses to be interviewed on public record for the first time. Boyle's twin sister Ann was among the group, which handed in a
petition containing more than 10,000 signatures demanding that an inquest be held. In March 2018, Gardaí issued a request for information regarding the case and stated that the investigation was still live. In 2016, controversial media personality
Gemma O'Doherty produced a documentary titled
Mary Boyle: The Untold Story, which explores several possible causes for her disappearance. In the documentary, Mary's sister Ann posits that Boyle was
sexually abused and then murdered. The film came under some criticism by the people interviewed for the programme. Both of the retired Gardaí sergeants who talked onscreen deny that any political pressure was brought to bear on their investigation; one interviewing officer said he was told to "ease off" when questioning one of the suspects in the case, but this was by a senior officer in the room at the time of the suspect's interview. The film led to O'Doherty being sued for defamation by
Fianna Fáil politician
Sean McEniff for damages of
€75,000, although McEniff was never mentioned by name in the film. In 2019, after McEniff's death, a judge granted his estate leave to continue the case. ==Suspects==