The man responsible for shooting children at a birthday party in Fort Worth, Texas and killing a woman and her 5-year-old granddaughter was put under arrest, police said.

The shooter identified as Erick Daniel Davila was arrested Tuesday. He will face charges of capital murder and probably receive the death sentence.

Investigators are still trying to find out what drove the man to shoot at the participants of a 9-year-old child's party.

The gunman reportedly drove by the house where the birthday party was being held and fired at the attendants. The shooting killed a woman, a 5-year-old girl and wounded four other people.

The woman identified as Annette Stevenson, 48, died at the scene, while the 5-year-old girl, Queshawn Stevenson, was rushed to the hospital, but the severe wounds to her neck and stomach made the treatment impossible. She died early Monday at the hospital, according to the Tarrant County Medical Examiner's Office.

The gunman also hit the nine-year-old birthday girl, who was actually struck by hit by shrapnel and three other: a woman and two children, authorities said.

The party was being held at Annette Stevenson's house. The gunman drove by the duplex and opened fire, police said.

Investigators are currently trying to determine whether the house was being targeted and if so, what could be the reasons that drove the man to act in such a brutal way.

Witnesses said the 48-year-old woman was shot as she was trying to get the kids inside the house for safety according to Dallas-Fort Worth television station WFAA.