Dallas man arrested in 1984 murder of aspiring model: "They found the guy that killed my sister 38 years ago"

Investigators arrested a 60-year-old Dallas man on a capital murder charge in the 1984 killing of a 21-year-old woman after linking him to the crime through genealogical databases, prosecutors said. 

Edward Morgan was arrested in the killing of Mary Jane Thompson, who was also sexually assaulted, the Dallas County district attorney's office said Friday.  

Morgan was being held Friday at the Dallas County jail, CBS DFW reported. Bond was not yet listed for him, nor was an attorney.