In 1950, Abigail Turnbull was a girl of only 14 years when she got pregnant. Her family rejected her and she went to St. Helen's Home for Unwed Mothers. As with other girls at St. Helen's, her baby was taken from her and put up for adoption. Abigail had nowhere else to go and she continued to live at St. Helen's for the next 50 years. Over time she received a college education and became a social worker at St. Helen's. After retirement she lived in an apartment complex on Vineland Boulevard in Studio City.
In October 2016 Harry Bosch went to see her in hopes of getting information about Vibiana Duarte and her baby. Abigail remembered Duarte and was able to help Bosch identify her baby as Dominick Santanello.