A mother and her son were shot and killed by her boyfriend at a Massachusetts home, where officers found the suspect with a gun believed to be the murder weapon, according to police. Arlington Cole, 54, has been charged with two counts of murder and one count of unlawful possession of a firearm in the deaths of Nicholas Almeida, 25, and his mother, Elizabeth Almeida, 54, the Bristol County District Attorney's Office said in a news release issued Sunday, February 1. Cole is accused of killing Nicholas and Elizabeth at a Fall River home the evening of Friday, January 30, when police were called to a double shooting, according to an earlier release shared by the district attorney's office. There, they found an armed Cole, who police said "was in a dating relationship with Elizabeth." On Monday, February 2, Cole appeared in Fall River District Court for an arraignment and "agreed to be held without bail," a spokesperson with the district attorney's office confirmed to Us Weekly via email. Man Charged With Murder After Fatally Shooting 2 People at Birthday Party It is unclear what led to the fatal shootings, as authorities have not specified a potential motive. Nicholas and Elizabeth were declared dead at a hospital after they were found shot on January 30, according to the district attorney's office. Cole's defense attorney, Tim Bradl, told WPRI-TV that "We have a lot to sort through ... It's really too early to tell exactly what that is yet." "Personal thoughts are with the family for such a terrible loss," he added, according to the TV station. "I have a job to do and I'll do it, but [it's] a terrible case." According to a GoFundMe page established for Elizabeth and Nicholas' funeral costs, the shooting unfolded after Elizabeth's daughter and Nicholas' sister, Marissa, was hospitalized in connection with a mental health condition. "Nick Almeida and his mother, Elizabeth, were brutally taken from this world in a senseless act of violence by someone who was supposed to protect them," reads the GoFundMe page. Marissa, described as having "mental health Disorders that prevent her from caring for herself," has "lost the only two people who loved and cared for her unconditionally," the page says. The page was also established for costs associated with Marissa's care. "The cruelty and finality of this act has left a family shattered beyond comprehension ... [Marissa] is now alone, grieving, mentally vulnerable, and facing an uncertain future through no fault of her own." Man Shot by Cops Before Being Arrested for Fatally Beating Parents Cole is set to appear in court next month for a probable cause hearing on March 6, the district attorney's office said. Bristol County District Attorney Tom Quinn III told WPRI-TV that his office will be presenting evidence against Cole to a grand jury. "Tensions can be high, emotions are high," Quinn said, according to the TV station. "You've got two people whose lives have been taken. It's tough to come to grips with that - ever, but especially at this point in time so shortly after the homicides." Fall River is about an 18-mile drive southeast from Providence, Rhode Island.