32-year old Sarah Tyminski, who resided at 8571 Eloise Lane, Joplin, is dead after a triple shooting on Monday in northern Newton County. Her boyfriend, Chris Lamb, 35, remains in critical condition with a chest wound at Mercy Hospital, Joplin. His father, 60-year old Rickey Lamb is in custody at the Newton County Jail charged with murder in the 1st degree, domestic assault in the 1st degree and two counts of armed criminal action. He is being held on a $500,000 cash only bond. The shooting occured over custody of two children whose parents are Tyminski and Chris Lamb.

Rickey Lamb was scheduled for an arraignment at 9 a.m. Wednesday, June 19 in Newton County Division II Circuit court.

According to a witness, father and son argued about the custody of two children over the phone. The senior Lamb has had the children, belonging to Tyminski and Chris Lamb, in his care for about a year.

Lamb told authorities that his son threatened not to return the children to his care after their next visit.

Rickey Lamb left his residence at 3615 Apricot Drive, Joplin, with his .30-06 rifle with the intent to scare his son so that he wouldn't pursue custody.

He says the rifle was for his protection because he knew his son had a shotgun. Lamb claims that his son fired at him upon his arrival. Lamb claims he shot his son, who dropped the shotgun. According to his account, Tyminski attempted to pick up the shotgun so he shot her.

Tyminski died at the scene from a gunshot wound that traveled through her hand and into her abdomen.

At that point, Chris Lamb retrieved his shotgun and shot his father in the shoulder.

A witness at the scene, Teresa Brown, who lives at the same address as Tyminski and Lamb, tells a different version. She stated that Rickey Lamb began shooting when he pulled up to the house. Chris Lamb and Tyminski had both already shot when Lamb shot his father.

Rickey Lamb suffered a gunshot wound to the shoulder, returned home and was later treated at Freeman Hospital before being released into the custody of the Newton County Sheriff's Department.

The Neosho Daily News will continue to follow the story, updating as more information becomes available.