The FBI is offering a $10,000 reward for information that could lead to the arrest of Jorge Ernesto Rico-Ruvira.
The 32-year-old is wanted in connection to the first-degree murder of his girlfriend in Roswell, New Mexico.
Authorities say Rico-Ruvira might have fled with his 3-year-old son Osciel Ernesto Rico.
Rico-Ruvira is described as 5-foot-8, 150-pounds with black hair and brown eyes.
He might be driving a maroon four-door 2003 GMC Yukon with a New Mexico license plate.
Anyone with possible information about Rico-Ruvira is asked to contact the FBI.