Shad Skov was sentenced to 15 years in prison for transmitting HIV to his son, The Associated Press reports. The Grand Junction, Colorado, man had not disclosed his status before having sex with the boy’s mother, his fiancée.

The 34-year-old father pleaded guilty to child abuse and apologized to the woman and his 1-year-old son during his July 17 sentencing.

According to the article, Skov’s fiancée had tested negative for HIV two months into her pregnancy. However, doctors later found that the woman and Skov’s son were positive when the boy, who was extremely underweight, acquired pneumonia at 4 months of age. 

Two other women have told the authorities they had sex with Skov around the time he met his baby’s mother.