"Even the smallest detail may help solve this cold case," R. Christopher Knowles, senior assistant attorney general and chief of the state's Cold Case Unit, said during a press event on Monday.
Knowles said detectives are especially interested in hearing from anyone who saw or spoke to Miller between the hours of 4 p.m. on Sunday, Oct. 31, 2010, and 5 p.m. on Monday, Nov. 1, 2010.
Miller's body was found in the early evening, and an autopsy determined that she died of multiple gunshot wounds, Knowles said.
"Investigators found that Miss Miller's yellow Labrador retriever named Sport was also shot multiple times and killed, underscoring the brutality of this heinous crime," Knowles said.
Just two days before her murder, her ex-husband Gary Miller's cabin in Acton, Maine, was burned down, events their daughter, Jennifer Miller, said she believes are connected. She spoke publicly about her mother's case on Monday, at times struggling to speak through her tears.
"It's just too coincidental to lose your house in a fire by arson, and then a day and a half later, someone in the family is murdered," she said. Jennifer Miller was 26 when her mother was killed. She now works as a thermal engineer for NASA in Pasadena, Ca.
She said the murder of her mother has frayed her relationships with other family members, as theories have circulated about whether someone in the family was responsible for the crime.
Jonathan Miller, Jennifer Miller's brother, has said in court filings that his father, Gary Miller, blames him for the murder, InDepthNH reported. Both men have denied any wrongdoing, the outlet reported.
"I know what's said online, too. I know a lot of people look at my own family," Jennifer Miller said.
"I lost my entire family in this," she said.
Jennifer Miller said she thinks the fact the murder happened on Halloween could have given the perpetrator cover, since wearing a mask wouldn't draw the same scrutiny as it would on a normal day. But, she said, she doesn't believe her mother's killing was a random act of violence.
Members of Bobbie Miller's family who spoke on Monday remembered her as an avid hiker and kayaker who had a vibrant personality and was kind to others. Her daughter Jennifer said her mom was always the one to dole out snacks that would be forbidden by other parents.
They also described major changes in Miller's life in the months and days leading up to her death. About three months before Miller was murdered, her divorce from her husband of 30 years was finalized after a protracted three-year ordeal, he said.
"It was not a great relationship at the end," Gary Miller said. But, he said, during their marriage there were both good times and bad times, and no incidents of violence between them.
"Anybody that's been through a divorce, it's not pretty for anybody," Gary Miller said during Monday's press conference.
Bobbie Miller had recently moved to a new house in Gilford closer to her son, leaving the last chapter of her life in Wolfeboro where she had raised her children behind, according to her daughter. Jennifer Miller said her mom was taking business classes and working to establish a career for herself.
She was last seen alive on a video camera at Lowe's, shopping for materials to build flower boxes for her new house, according to her older sister, Mickie Moore.
"She told my mom she was afraid," Moore said. "She didn't know why, she was just afraid."
Moore said she has her own theory about who killed her sister, although she stopped short of accusing anyone by name. Rather, she said her sister had a close relationship with someone she was always trying to help.
"My sister would always bail them out, always. And I think one time my sister said no, and they got upset enough that they took her life," she said. "My whole family pretty much feels the same."
Miller's family has offered a reward of up to $56,000 for information leading to the arrest and prosecution of whoever is responsible for her murder.
Above all, members of the family agreed, they are desperate for closure.
"If we don't find justice, then none of us can move on," said Jennifer Miller. "We just continue to circle around and around in this never ending pit of whodunit or what ifs."