Family says it was all an accident and the two parents, ages 15 and 16, would never do anything to intentionally harm their infant son, Cody Phelps.
"This is my first grandson and I love him so much. He has all kinds of love, everybody loves this little baby. And like I said, they love on him all the time," said Valarie Wynn, the baby's grandmother.
Wynn says she was asleep when baby Cody began crying around four in the morning on Tuesday.
"They told me that they think they picked him up the wrong way. And where his little head doesn't hold up by itself, that he may have been picked up the wrong way," said Wynn.
She says this is what caused baby Cody's broken collarbones.
Police say he also suffered a spiral fracture to his femur, and after interviewing both parents at the hospital officers with the Harlan County Sheriff's Office took the child into protective custody.
He was then flown to UK Hospital for treatment.
"We'll determine how much intent there was and we're just gonna go from there and present all our findings to the county attorney and they'll take it to the court," said Harlan County Sheriff Marvin Lipfird.
For now, both teens are being held in the Breathitt County Juvenile Detention Center on charges of assault first degree, endangering the welfare of a minor first degree, and criminal abuse of a victim under the age of twelve first degree.
The detective on the case told Mountain News it's the nature of the injuries that raised suspicion in the first place.
Both parents will be in Harlan District Court on the 24th of August.
Police say the investigation is ongoing and that other charges are possible