'Two beautiful boys': Hundreds mourn Powell brothers killed in arson Braden and Charles Powell Updated at 2:32 p.m. ET: TACOMA, Wash. -- Hundreds of mourners gathered at a church Saturday to remember two young boys killed when their father burned their house to the ground with himself and his sons inside. Sunday's murder-suicide arson, which claimed the lives of Josh Powell and his sons, Charles, 7, and Braden, 5, capped a grim family saga that began more than two years ago with the disappearance of the boys' mother, Susan Powell, under suspicious circumstances in Utah. The two brothers were at the center of a bitter custody dispute between their father and the parents of his missing wife. Investigators now presume Susan Powell was slain by her husband, though her body has yet to be recovered. Watch live: Funeral for Powell brothers "This moment is about two beautiful boys," Dean Curry, lead pastor of the Life Center church in Tacoma, an Assemblies of God congregation, said as the service got under way. "There have been all kinds of things said surrounding those boys," Curry added. But what we do here, and the spirit that we do have here, is up to us. Many of the mourners wore purple and blue ribbons in memory of the children. Family members and the boys' teachers were among those scheduled to speak. The boys' remains lay in one coffin aorned with flowers. At the family's request, members of the public were invited to attend the memorial. Curry said earlier he expected as many as 2,400 people to turn out for the service. Sheriff's Dept., Josh Powell, left, is seen making a withdrawal at a bank in Puyallup, Wash., on the day before Powell and his two young sons were killed. Last week, a judge denied Josh Powell's bid to regain custody of his sons, citing the "extreme child porn" found last September in the house he rented near Tacoma. That discovery had led to the arrest of the boys' grandfather, Steven Powell, who had been living with them and whose vast pornography collection included images of their missing mother. He now awaits trial on criminal charges related to the photos. The boys were ordered on Feb. 1 to remain in the custody of their maternal grandparents, Charles and Judy Cox, at least until Josh Powell, 36, submitted to a psycho-sexual evaluation. Four days after that decision, a child welfare case worker delivered the two boys to their father's home for what was supposed to be a supervised visit. But he abruptly locked her out, then set off a fiery explosion that consumed the house as the worker, herself uninjured, watched in horror and called authorities by phone. Medical examiners later said the two brothers had suffered chop wounds from hatchet blows inflicted by their father moments before all three died from smoke inhalation. 911 operator in Powell case: 'It was horrible' Pierce County prosecutor Mark Lindquist said earlier this week that he considered "the murder of those children a confession to the murder of Susan Powell" and that he viewed the ongoing investigation into her fate as a murder investigation. At the time his wife was reported missing, Josh Powell told police he had taken his sons camping in subfreezing temperatures just after midnight on Dec. 7, leaving his wife at home, and that she had vanished by the time they returned that afternoon, according to court documents. The grandfather, Steven Powell, 62, was charged in September with 14 counts of voyeurism and one second-degree charge of possession of child pornography. Shortly after that, the boys were placed in the custody of their maternal grandparents.