A Johnson City Couple Accused Of Endangering Children Are Being Held On A $100,000 Dollars Bond Each. Helen Coy And David Miller Are Each Charged With Two Counts Of Heinous Aggravated Child Endangerment, Aggravated Child Endangerment And Two Counts Of Heinous Aggravated Child Neglect. Police Said The Investigation Involved Three Children. Coy And Miller Will Appear In Court Soon.