A father shot dead his girlfriend and her two children before setting their home on fire , authorities have said . Corey LaValley , 32 , was arrested on Tuesday for the murders of 33-year-old Debra Sheppard , his 10-year-old son Corey LaValley Jr. , and Sheppard 's daughter , 13-year-old Emma McComber . He is accused of shooting the trio dead at their mobile home in Dorr , Michigan on Monday before returning to the home and setting it alight on Tuesday at around 1pm . Police found LaValley at a relative 's home later that evening and took him into custody without incident . He has been charged with open murder , arson and using a firearm during a felony . 'Killer ' : Corey LaValley , left , allegedly shot dead his girlfriend Debra Sheppard , right , and her two children on Monday before returning to their Michigan mobile home on Tuesday and setting it alight . Murdered : LaValley allegedly killed his 10-year-old son , Corey Jr , left , and his girlfriend 's 13-year-old daughter , Emma McComber , from a previous relationship . Her dad said he had feared for his daughter 's safety . LaValley was being held by the Allegan County sheriff 's office . On Thursday afternoon , he was arraigned via video link . 'We did receive information that for us established probable cause that Corey LaValley , who is the father of one of the people we believe to be deceased , was involved in ultimately the criminal act that caused this , ' Allegan County Undersheriff Frank Baker told Fox17 on Wednesday . Police told the channel that LaValley and Sheppard had been in a relationship , and neighbors told Newschannel 3 that they would often hear the couple arguing . Authorities have not released a motive for the murders but family members said LaValley had a history of violence . Records show he also had a history of arrests dating back to 2001 . Devastated : Emma 's father , William McComber , hugs his mother-in-law at his home in Lowell , Michigan , a day after he learned that his 13-year-old daughter , her mother and brother had been murdered . Burned down : The family 's mobile in Dorr , Michigan was destroyed by a fire on Tuesday afternoon . The 13-year-old girl 's father , William McComber , 36 , said he had been worried for his daughter 's safety . He claimed he had filed for custody of his daughter but a judge denied his request . The last time he saw her was November , he said . ' I want people to know this is n't just `` guy snaps one day , freaks out , and kills his girlfriend and kids '' . This is years of building up to this , years of warning signs nobody took me seriously about . ' He added : 'It 's one thing to lose someone in an accident , but when I think about it and knowing the fact that my daughter was shot , intentionally… it was n't even accidental . ' On a GoFundMe page for the girl , William McComber said : 'She was loved by everyone who was lucky enough to know her . ' Records show that LaValley has previously been arrested for misdemeanor assault , retail fraud and disturbing the peace in charges dating back to 2001 . The family has set up GoFundMe accounts to raise money for the three funerals . Visit here for the page for the family and here for a separate page for Emma . Scene : Hours after the home burned down , LaValley was found at a relative 's home and taken into custody . Distraught : Family members embrace each other at the scene of the suspicious fire on Tuesday afternoon .
LaValleyCorey LaValley ' 'shot dead his girlfriend , her two children - including his son - in their mobile home and returned to burn it down the next day ' The bodies of Debra Sheppard , 33 , Emma McComber , 13 , and Corey LaValley ' 's son Corey Jr. , 10 , were found at the home in Dorr , Michigan on Tuesday . Corey LaValley ' was arrested without incident on Tuesday evening and was arraigned on murder , arson and weapons charges on Thursday . The 13-year-old girl 's father said he had feared for his daughter 's safety and had unsuccessfully tried to remove her from the home .