He did not immediately describe a motive.
An unidentified official told The Associated Press that Franklin Junior Merán was arrested Tuesday on suspicion of renting one of the cars used in the June 9 shooting in Santo Domingo.
Ten other suspects have already been ordered to spend a year in preventive detention as the investigation continues, including the accused shooter. Authorities say they are looking for at least three other suspects, including the man they believe paid the hit men.
Ortiz continued recovering Wednesday in the intensive care unit at Massachusetts General Hospital in Boston. Ortiz’s wife, Tiffany Ortiz, said doctors upgraded Ortiz’s condition to good Tuesday.
“We remain grateful to everyone who has helped David through this ordeal, both in the Dominican Republic and here in Boston,” Tiffany Ortiz said in a statement released by the Red Sox. “David’s journey to good health has been bolstered by the many expressions of love that have come to us from across the globe. Your support has lifted his spirits tremendously during this challenging time.”
Authorities continue to investigate.
The Associated Press contributed to this report.