Ron Nelson

Ron Nelson is the father of Sarah Nelson.

Sarah's Injury and Disappearance
Ron came into the ER with his daughter, Sarah, who broke her wrist jumping down the basement stairs. He and his wife, Dana, were separated and it was his weekend with Sarah, so he was distracted unpacking her bag. Because Sarah had several recent ER visits, James wanted to call DCFS to investigate, but Cooper called in Violet instead to talk to Sarah.

Dana arrived just as Violet went to talk to Sarah and was angry at Ron for Sarah getting injured. She wanted to take Sarah home with her after her cast was on and told Ron she was going to sue him for full custody. Sarah said she wanted to be with Ron, too. They started arguing and James forced them both to leave.

Violet talked to Sarah about her home life and her parents' arguing. She said that her parents' fighting made her want to run away.

When Violet asked to talk to each of the parents separately, they started to bicker and Sarah came out of her bay to yell at them to stop. Dana went to sit with her while Ron went to talk to Violet.

Ron told Violet that he'd slept with his assistant and when he told Dana about it, she threw him out and refused any attempt at reconciliation. He also told Violet that Sarah was the best thing in his life and he'd never hurt her. Violet asked to sit down with both of them, but Dana started arguing. Violet said that them fighting was damaging Sarah and they needed to stop. Dana went to give Sarah the ice cream she'd gotten, but Sarah wasn't in her bed. Dana looked frantically around the ER for Sarah while Charlotte called a Code Pink.

They searched the hospital for Sarah while Ron and Dana waited. Violet gave Dana a sedative to calm her down, but Ron refused one, saying he wanted to stay clear. They found Sarah's raincoat on a bench outside the hospital and told her parents she wasn't anywhere in the hospital. She was officially missing. When morning came and Sarah was still gone, Violet came to the Nelsons and told them it was time to go home because there was nothing more they could do there. ("You Don't Know What You've Got Till It's Gone")

Romantic
He is married to Dana Nelson. They separated when Ron slept with his secretary and had a highly contentious relationship.

Familial
His daughter, Sarah, disappeared from the ER at St. Ambrose Hospital.