PARKER COUNTY, Texas — A 7-week-old baby is in critical condition and his mother's boyfriend is in jail in Parker County after sheriff's investigators say the boyfriend injured the infant while trying to get him to stop crying.

The Parker County Fugitive Apprehension Strike Team arrested Kaleb Ray Eisenmann, 20, of Springtown, the Parker County Sheriff's office sad.

Eisensmann was watching the baby, a 2-year-old and a 6-year-old while their mother was at work on Valentine's Day, according to the sheriff's office. Eisenmann called the mother saying the baby had a cold and wasn't breathing right. When the baby's mother got home, she said the baby was pale and lethargic and "not acting normally," according to the sheriff's office.

Sheriff's investigators said Eisenmann got frustrated when the baby started crying and wouldn't stop.

“I didn’t slam him in the bed,” Eisenmann told investigators. “But I put him down really kinda hard [sic].”

The baby had a seizure on the way to a hospital in Azle. He was then taken to Cook Children’s Medical Center in Fort Worth, and is currently in critical condition in the hospital's neonatal intensive care unit (NICU), according to the sheriff's office.

The baby was found to have suffered severe head trauma, and hospital staff said his injuries were consistent with abuse.

The two other children at the house with Eisenmann, ages 2 and 6, were medically evaluated by hospital staff as well. Staff found bruises on the 2-year-old, the sheriffs office said. 

The other children were eventually released back to their mother, who is not considered a suspect.

Eisenmann is currently in the Parker County Jail charged with injury to a child with intent to cause bodily injury. His bond was set at $50,000.

The case is still under investigation. 

This story has been updated to reflect the correct age of the child who was abused. He is 7 weeks old.