The ex of a woman convicted of killing their five-year-old son by poisoning him with salt has lashed out on Facebook just days after she was sentenced to 20 years to life in prison. Lacey Spears of Scottsville, Kentucky, who was spared the maximum 25 years to life, appeared emotionless as the verdict was read in the death of her son Garnett-Paul Spears. The boy's father, Chris Hill, was not emotionless however and wrote of his wife's sentence; 'Please put her in general population! Thats all im asking for! Because she wont make it.' Scroll down for video . Garnett-Paul Spears' (left)  father Chris Hill (right) lashed at his ex and the boy's mother on Facebook this week expressing his hope that she would die in prison . Lacey Spears of Scottsville, Kentucky, was found guilty last month of second-degree murder in the death of her son at a suburban New York hospital (pictured Wednesday) She was spared the maximum 25 years to life and instead received 20, showing no emotion when she was sentenced . As the conversation continued on his Facebook page the father, who said he was tired of crying over the loss of his boy, stated; 'Crazy a** woman needs to be beat to death in prison.' He also noted his ex's complete lack of emotion at her sentencing, writing; 'No emotion what so ever. What the hell!??' The New York judge who sentenced Spears on Wednesday said she suffers from a mental illness and said the crime was still 'unfathomable in its cruelty.' Prosecutors asked for the maximum sentence, saying Spears made her son ill because she had a bizarre need for attention. Spears' lawyer requested the minimum 15 years to life - he called her a hardworking single mother who gave her son unconditional love. Prosecutors said Spears loaded the hospitalized boy's . feeding tube with a lethal amount of salt and kept on blogging. Poignant: Spears is seen here with her son Garnett.  Prosecutors said Spears loaded the hospitalized boy's feeding tube with a lethal amount of salt and kept on blogging . Spears' lawyer Stephen Riebling said she was innocent and blamed the hospital for negligence as he revealed  plans to appeal . the verdict. While awaiting sentencing, she was being held at Westchester . County jail in Valhalla, said a spokesman for Westchester . District Attorney Janet DiFiore. Prosecutors blamed Spears, who lived in Chestnut Ridge, . about 32 miles  north of New York City, for her son's . short and tormented life. Prosecutors blamed Spears, who lived in Chestnut Ridge,about 32 miles (51 km) north of New York City, for her son'sshort and tormented life . 'Throughout his five years, Garnett Spears was forced to . suffer through repeated hospitalizations, unneeded surgical . procedures and ultimately poisoning with salt, all at the hands . of the one person who should have been his ultimate protector: . his mother,' DiFiore said after Spears was convicted. 'Using the child's 'illnesses' to self aggrandize herself, . her actions directly lead to her son's tortured death,' the . prosecutor said. Spears told investigators that her blond, blue-eyed son, . whose father was killed in a car accident, suffered from a slew . of medical problems from Chrohn's and Celiac diseases to ear . abnormalities, according to court papers. Her social media posts about his ongoing problems and . hospitalizations, including photos of his final hours on life . support, were introduced as evidence by the prosecution at . trial. Spears did not testify at the trial.
Lacey Spears of Scottsville, Kentucky, was found guilty last month of second-degree murder in the death of Garnett-Paul Spears .
The 27-year-old Spears force-fed heavy concentrations of sodium through the boy's stomach tube .
Judge who sentenced Spears on Wednesday said she suffers from a mental illness and said the crime was still 'unfathomable in its cruelty'
She showed no emotion when she was sentenced to 20 years in prison .
The boy's father Chris Hill wrote on his Facebook account of Spears: 'Crazy a** woman needs to be beat to death in prison'