Carbon monoxide poisoning is the apparent cause of death for a 4-year-old Nebraska girl, whose Kansas grandfather is charged with first-degree murder. The Topeka Capital-Journal on Thursday cited court records related to the death of Brandy Funk. Testing found a carbon monoxide level more than six times above a lethal level in the girl's blood. Brandy, of Beatrice, Nebraska, died in July. Court documents say Timothy Wayne Funk Sr. acknowledged he left a generator running in the garage of his Silver Lake, Kansas, home with its door shut while watching the girl and another granddaughter. According to documents obtained by WIBW, early on July 23, Timothy Funk Sr. woke up and found that both granddaughters were sick and had thrown up, and he cleaned up the vomit with blankets.The other child survived.An attorney for Funk Sr. called the girl's death a "tragic accident."Related video below: A silent killer: Detecting carbon monoxide