ST. PETERSBURG, Fla. -

More than a year after they were found slain in their home, authorities have charged an Orlando man with killing a St. Petersburg woman and her infant son.

Ralph Daniel Wright Jr., 40, was arrested Wednesday morning in Palatka. He was charged with two counts of first-degree murder in the deaths of Paula O'Conner and her son, Alijah.

O'Conner was reported missing in July 2007 after she failed to show up to work. Autopsies determined O'Conner had been strangled and her son was asphyxiated.

Police said O'Conner had filed a paternity suit against Wright, a former sergeant at MacDill Air Force Base in Tampa, before her death. Investigators said Wright is the child's father and that DNA evidence links him to the crime scene.