DENVER (KDVR) — This month marks 28 years since the murder of a six-year-old girl in Boulder that has captivated the world ever since. As a new documentary series and fresh hope from police bring new heat to this notorious cold case, the father of JonBenét Ramsey told FOX31 he’s hopeful the case can be solved. “Well it’s encouraging that they’re optimistic, for sure,” Ramsey told FOX31’s Jeremy Hubbard, referring to press reports citing investigative sources who say they feel like resolution is within reach in 2025. Police deny sitting on evidence as Netflix doc brings renewed attention to JonBenet Ramsey’s killing “I think if the right things are done, it can be solved. I really believe there’s a high probability with the technology that’s out there today that wasn’t there eight years ago when the last DNA testing was done,” he said. Ramsey is pushing for further DNA testing. Testing weeks after the December 26, 1996, murder revealed unidentified male DNA was found at the crime scene. Ramsey said police didn’t do much with that evidence because it didn’t fit the investigative theory that Ramsey and his late wife, Patsy, were to blame for their daughter’s death. “Today’s technology that’s out there can do amazing things with very minute samples,” Ramsey said. He’s hopeful police will use genealogical DNA, or genetic genealogy DNA testing, to trace potential suspects. And he’s fighting for more collaboration between Boulder Police and outside agencies and experts to solve the crime. Flowers, pictures and stuffed animals adorn the gravesite of JonBenet Ramsey in Dec. 1997. (AP Photo/Ric Feld, File) “If we don’t do that, we haven’t done the best thing we can do,” he told FOX31. Ramsey said he’s encouraged by changes in the detective ranks at Boulder Police Department, including the departure of the lead investigator in the JonBenét case. And he’s encouraged by the arrival of a new chief, Stephen Redfearn, who took over the department on a permanent basis in September. What happened to JonBenét Ramsey? New documentary set to premiere this month “You can’t promote from a dysfunctional organization and hope it’s going to get better,” he said. Late last month, Boulder police released a video updating the JonBenét Ramsey investigation. In it, Redfearn said he is in communication with the Ramsey family. “He’s a good guy, I’ve met with him a couple of times, I like him. He’s reasonably open, but he doesn’t tell me enough to give me confidence that things are happening,” Ramsey said. “They need to be more candid in what steps they’re taking than they have been. And that’s frustrating. He did call a couple of weeks ago, which I appreciated. But he doesn’t really tell me anything specific.” The case has garnered new attention in recent days because of a docuseries on Netflix, called “Cold Case: Who Killed JonBenét Ramsey.” “I’ve not watched it. And people said you probably should’ve watched it. It’s upsetting. My wife did watch part of it and said it’s pretty good. It’s pretty thorough. And upsetting. But that was what we dealt with,” Ramsey said. He said that he participated in the documentary and in interviews to keep the case alive. And it seems to be working. “I got a letter yesterday from a lady that said 'I think my husband did it. Please call me.' So I will,” he said. Late this month will mark 28 years since his daughter’s body was found in the cellar of their Boulder home the day after Christmas. This Friday Oct. 25, 2013 photo shows the Ramsey home where JonBenet Ramsey was found in Boulder, Colo. on the day in which new court documents were released in the Dec. 26, 1996 death of the six year old. According to previously unreleased documents from 1999, grand jurors who reviewed evidence in the death of Ramsey indicted both of her parents for child abuse resulting in death and being an accessory to a crime, including a first-degree murder that remains unsolved. (AP Photo/Brennan Linsley)In this Jan. 3, 1997, file photo, a police officer sits in her cruiser outside the home in which 6-year-old JonBenet Ramsey was found murdered in Boulder, Colorado. Twenty-five years after JonBenet Ramsey was killed, police say DNA hasn’t been ruled out to help solve the case. The 6-year-old was found dead in the basement of her family’s Boulder home on Dec. 26, 1996. Her death was ruled a homicide, but nobody was ever charged in the case. (AP Photo/David Zalubowski, File) “You know, Christmas, for several years, we just didn’t celebrate. And then we realized we really need to do that,” he said. $75,000 reward for information remains in Maggie Long’s 7-year-old Colorado cold case Ramsey will spend part of the holidays with relatives in Denver. He plans to meet in person with Boulder police sometime after the first of the year, hoping for a big break in the case. Even if an arrest, prosecution or conviction ever comes about, he knows there’s a segment of the population who will always believe he and his late wife are to blame. “It’s just lies. The Bible references that type of person as a fool. And basically says, keep the fools out of your life. I’m not concerned that there’s still going to be five, 10% of people who still think we’re guilty. That’s just life. And nobody said life was going to be fair all the time,” he said.