(SAN ANTONIO) — An imprisoned former nurse who prosecutors believe could be responsible for the deaths of up to 60 children in Texas pleaded not guilty Thursday to murder charges in the deaths of five children in the early 1980s. Genene Jones, 67, was arraigned Thursday in San Antonio. She was brought into court in a wheelchair and wore a surgical mask. Jones is serving concurrent 99-year and 60-year sentences in state prison for the killing of 15-month-old Chelsea McClellan and the sickening of 4-week-old Rolando Santos.