A Lawrence man admitted Tuesday that he killed his 3-month old son when he became upset because the infant would not stop crying while they were in their home in 2011, prosecutors said.
Alexis O. Medina pleaded guilty to second-degree murder in Essex Superior Court in Lawrence, where he received the mandatory sentence of life with the possibility of parole after 15 years imprisonment, for the death of his son and namesake, Alexis Medina, officials said.
Essex District Attorney Jonathan W. Blodgett’s office said Superior Court Judge Richard E. Welch also sentenced the 26-year-old Medina to 10 to 11 years in state prison for assault and battery on a child, which he will serve concurrently with the murder sentence.
Prosecutors said Medina admitted that he went into the child’s room, turned him face down, and then pushed on the child’s back until he stopped crying, eventually suffocating the infant on Dec. 28, 2011.
The child’s grandmother found the boy motionless in his crib, and he was taken to Tufts Medical Center, where he was pronounced dead one day later, prosecutors said.
Medina told police that he was frustrated the baby would not go to sleep.
Medina had earlier been sentenced to spend 18 months behind bars for fracturing the skull of his daughter, a child he had with a different woman.John R. Ellement can be reached at ellement@
globe.com. Follow him on Twitter @JREbosglobe.