Former patients of a retired Indianapolis fertility doctor expressed anger that he avoided jail time Thursday for lying about using his own sperm to impregnate as many as dozens of women after telling them the donors were anonymous. Dr. Donald Cline was given a one-year suspended sentence after pleading guilty to two counts of obstruction of justice. No other charges were filed ... because Indiana law doesn't specifically prohibit fertility doctors from using their own sperm. The charges stemmed from two confirmed cases of paternity. Matt White and his mother, Liz White, said Cline deserved far greater punishment. He said DNA tests showed that Cline was his biological father even though Cline told his mother decades ago that he used anonymous sperm donations. There's dozens of us," said Matt White. Some of the now-adult children of Cline's former patients filed a complaint with the Indiana Attorney General's Office in 2014, after they became suspicious while scouring online records to find biological relatives. Paternity tests performed the Marion County prosecutor's office determined Cline was likely the biological father of at least two of his patients' children. Cline, who retired in 2009, initially denied the allegations when he wrote to investigators, saying the women who filed the complaints were trying to slander him. On Thursday, he acknowledged that he had lied. Matt White said private DNA tests have identified 23 people as Cline's biological children with mothers who were his patients.