Source: Tom Hahn / GettyA quiet apartment complex in northwest Harris County became the scene of a devastating tragedy on Monday afternoon, as a murder-suicide claimed the lives of a woman, her younger sister, and the woman’s ex-boyfriend. The incident at the Shadow Ridge Apartments has left a community in shock and shines a somber light on the dangers of domestic violence. According to the Harris County Sheriff’s Office (HCSO), the deceased were identified as Yaquelin Arias Rivas; her sister, 19-year-old Saidia Machado; and Rivas’ estranged ex-boyfriend, 40-year-old Sebastian Rodriguez. As the investigation continues, authorities have yet to release a motive, but the case is being treated as a domestic violence incident that escalated into a double-homicide and suicide. The Harris County Medical Examiner’s Office will perform autopsies to confirm the official cause of death for all three individuals.