A Hardin man is accused of murdering a 4-week-old baby in Liberty County.

Brian Keith, 29, is charged in the July 2 death of Nevaeh Keith.

The Liberty County Sheriff’s Office says Keith is not Nevaeh’s biological father.

Officials say the murder charge comes after a five month investigation, which ruled the infant’s death was due to damage to the respiratory breathing system.

Deputies served the murder warrant on Thursday to Keith, who was already in jail for failing to comply with a condition of his probation.

The sheriff’s office says Keith has a long criminal record with the department.