Kierl, 35, 5534 McKenzie Drive, Lake in the Hills, was arrested Wednesday on charges that she shook a 1-year-old boy, causing brain damage and bleeding in his eyes, police said. When infants are shaken vigorously, the brain rotates inside the skull, injuring or destroying brain tissue, causing brain damage or even death, according to the National Center on Shaken Baby Syndrome. The Child Welfare League of America reportsthat shaken baby syndrome is the leading cause of child abuse deaths in the U. Mark Mogan said the baby’s mother, who lives in Crystal Lake, contacted Lake in the Hills police May 19 after the second incident in which the baby exhibited symptoms of screaming and vomiting after being cared for by Kierl. According to Department of Children and Family Services records, Kierl was licensed in 2001 to have a up to six children at her in-home day care business, and had no previous investigations, spokesman Kendall Marlowe said. read more