Esdras Marroquin Gomez, 32, who is known as "Victor," has been charged with second-degree murder.
Gomez, an undocumented Guatemalan native, worked as a part-time day laborer at the sprawling 300-acre Colley estate.
Gomez, who has been on the run since leaving the Northern Westchester area several days after the murder, was arrested in Mexico last week, Scarpino said. Gomez first went to Guatemala after the murder and then Cancun.
Much speculation had surrounded the homicide of the wife of multi-millionaire Eugene Colley, which occurred two years ago almost to the day. The 83-year-old Lois Colley was bludgeoned to death late in the afternoon, with the blunt-force trauma believed to have come from a missing fire extinguisher at the couple's 300-acre Windswept Farm estate.
Colley was found lying on the laundry room floor of her home by a caretaker at approximately 5 p.m. on Monday, Nov. 9, 2015. The caretaker called 911 to report the matter.
There were no signs of forced entry into Colley's residence, and nothing was out of order -- except for Colley's body and the missing fire extinguisher.
State police had looked at several employees, including two grounds workers who later pleaded guilty to stealing $30,000 worth of hay from the family's Windswept Farm.
Both 33-year-old men -- Angel H. Parra Penafiel and Hugo Ramirez-Morales -- lived on the farm where they were employed as laborers. They stole and then sold the hay over several years, police reported.
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