Shannan Gilberts Mom Mari Spoke Out Before Being Killed. The bodies of at least 1. New Yorks Gilgo Beach. Are they connectedWatch TV. Anytime. Anywhere. Download the TV Guide app for iPhone, iPad and AndroidSubscribe to PEOPLE now for details of the Long Island Serial Killer, on newsstands Friday. In one of her final interviews before she was also killed, Mari Gilbert spoke to PEOPLE of still pursuing justice for her 2. Shannan Gilbert whose death six years ago helped uncover the Long Island Serial Killer. It is not easy, said Mari, whose interview is featured in this weeks issue of PEOPLE, on newsstands Friday. I have to do what I need to do for Shannan and for the rest of the family. Nothing will bring any of us peace because none of it will ever bring her back. In a bizarre and tragic twist, Mari was killed in July and her younger daughter, Sarra, was accused of fatally stabbing her. Up until her death, she never stopped fighting for Shannan. Mari told PEOPLE, I hope it will bring awareness to any police department anywhere that regardless of who you are and what you do for a living that you are not judged, and that all cases are handled equally. Watch our new 1. People Magazine Investigates, which debuts with the two hour season premiere The Long Island Serial Killer on Monday, Nov. ET on Investigation Discovery Frank EltmanAPFrank EltmanAPMaris nightmare began when Shannan, an online escort, vanished without a trace on May 1, 2. Craigslist in the gated community of Oak Beach on Long Island, New York. Adding to the mystery, before she fled her clients house, Shannan called 9. Theyre trying to kill meMari spoke to her daughter the day before she disappeared. Shannan was making plans to visit her mom in Ellenville, New York to celebrate Mothers Day and Maris birthday. Shannan said she needed to make money so she could buy her mother a gift. Watch Final Storm Dailymotion more. I said, Shannan stay home, Mari told PEOPLE in that last interview. She said, I have to go out. I want to make money. I said her presence is my present. She said, Dont worry Mom I will be okay. I was like, I love you. It seems the closest that anyone has gotten to catching the Long Island Serial Killer may be a phone call. Little is known about whoever is responsible for. Theodore Robert Bundy born Theodore Robert Cowell November 24, 1946 January 24, 1989 was an American serial killer, kidnapper, rapist, burglar and necrophile. In a small Midwestern town, a troubled teen with homicidal tendencies must hunt down and destroy a supernatural killer while keeping his own inner demons at bay. Bye. And that was it. It was our last conversation. Want to keep up with the latest crime coverage Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter. Suffolk County Police Department. Shannans body was discovered on Dec. The four other bodies were wrapped in burlap and placed about 5. Gilgo Beach, leading police to believe that a serial killer, later dubbed the Long Island Serial Killer, was afoot. Though it was the search for Shannans body that led to the others, police didnt believe her case was linked and suspected she got lost in the inhospitable marshland. I understand thats very difficult to believe, it seems very counter intuitive, Suffolk County Police Chief Stuart Cameron tells PEOPLE. But again if you knew all the facts you would believe it as I do. In May 2. Suffolk County medical examiner ruled Shannans manner of death undetermined. However, Mari insisted that her daughter was murdered, and she hired attorney John Ray to fight for access to the 9. The family also asked a forensic pathologist to conduct an independent autopsy on Shannans remains, which found that her death was consistent with homicidal strangulation because a small bone in her throat was missing, possibly indicating it was fractured when she was murdered. Share questions and comments on this story at burst. People Magazine Investigates After Show, available Nov. Watch Kiss Me Deadly Download Full. PeopleEntertainment Weekly Network PEN. Go to PEOPLE. comPEN, or download the PEN app on Apple TV, Roku Players, Amazon Fire TV, Xumo, Chromecast, i. OS and Android devices. Before she died, Mari said she was encouraged that the FBI had joined the search for her killer. I am hopeful for the fact that they have more resources to pursue other avenues that Suffolk County police either didnt have the money or the manpower to do, she said. Victor Alcorn. Victor Alcorn. In her final interview, Mari, who worked at a Walmart in Ellenville, New York, also spoke about how the pursuit of justice for her daughter had taken a toll. Everywhere I go, people recognize me at my job, she told PEOPLE. I have random strangers come up to me and know who I am. You just have to act like you are okay and happy and everything is fine. It is like I am living two different lives. Nothing is the same. I lost my soul. On July 2. Gilbert was found fatally stabbed in the living room of 2. Sarras apartment in Ellenville. Ray tells PEOPLE that Gilberts youngest daughter suffers from schizophrenia. She had been hearing a variety of voices and hallucinating all related to Shannan, Ray said. Her mom went to help her, and she is dead. Ray says he and Gilberts two remaining daughters plan to continue to fight for answers for Shannan and her mother. She was broken down and depressed and she was a poor poverty stricken person, Ray says of Mari. She was a single mom trying to raise kids and grandkids. She did what any mother would try to do for her kids. I just cant not do it. That is what Mari would have wanted. She pursued this case relentlessly. Watch The Blue Max Online Hitfix.