On May 6, 2010, Joseph (Jose) Mercado, 32, carried out a mass attack at the home of his ex-girlfriend Serena Tarin in Hawaiian Gardens, California. Mercado set the house on fire while family members were inside, then forced entry and opened fire with an assault rifle. Serena Tarin, her brother Alfred A.D. Tarin, 19, and their father Alfred Tarin Sr., 53, were killed. Two other family members were wounded, one critically. As Mercado exited the house he was shot by a sheriff’s deputy and taken into custody.

This crime combined arson, forced entry, and multiple shootings and left a family decimated. If anyone knew the family, the home, or saw activity in Hawaiian Gardens that morning, please share information that could help clarify what happened.