SPRINGFIELD, Ohio (WDTN) –  The jury took about an hour to convict 21-year-old Brett Meddock of murder, involuntary manslaughter, felonious assault and two counts of child endangerment in the death of 16-month-old Kayden Payne.

Prosecutors said he inflicted both external and internal injuries on the child’s head, neck and body.  During an autopsy report the medical examiner testified that he found knuckle impressions on the child.

Meddock was dating Kaden’s mother at the time of his death.  The child’s mother, Sierra Coy, testified that she left the baby alone with Meddock for a short period of time and less than an hour later she noticed the child was breathing differently. Kaden Payne died on Jan. 20, 2015 of multiple blunt force trauma, according to a coroner’s report.

During court proceedings, a jailhouse recording was played of Meddock stating that he did it on purpose and the boy wouldn’t stop crying.

Meddock’s attorney argued that the injuries were accidental and occurred during wrestling and rough play with the child.  Meddock also stated during a police interview that the toddler was thrown into a wall by accident while play fighting.

Meddock did not take the stand and his attorney did not present any witnesses during his trial.

Assistant prosecutor Amy Smith said it was no accident.  In her closing statement she said Meddock was abusing the child for quite some time based on medical reports and his failure to pass three polygraph exams.

“Kaden Payne died from multiple inflicted Blunt force trauma injuries that would have been symptomatic, shortly afterwards, shortly after they were inflicted.  Injuries that were inflicted by the one and the only person with access to Kaden unsupervised,” Smith said.

Meddock will be back in court on September 14th for sentencing.  He faces up to life in prison.