SANTO DOMINGO, Dominican Republic — A Dominican baseball prospect for the San Francisco Giants is the main suspect in the killing of a 25-year-old man, police said Sunday.

Angel Villalona, who played for the Augusta GreenJackets last season, turned himself in 12 hours after the man was shot at a bar in the southern coastal city of La Romana, Coronel Adrian Urbaez told The Associated Press.

“The Giants were disappointed to learn that there was an incident in the Dominican Republic last night in which an individual was killed and one of our minor league prospects, Angel Villalona, may have been involved. We will monitor the situation closely and trust that the judicial process in the Dominican Republic will resolve the matter promptly and fairly,” the team said in a statement released today.

Villalona, a first baseman, was signed by the Giants in 2006 and received a club-record $2.1 million signing bonus. He played in 74 games with the Giants advanced Class A team in San Jose, Calif., this season, posting a .267 batting average with nine home runs and 42 RBI.

The 19-year-old was considered the Giants’ most prized prospect when he signed and was chosen the top prospect in the Arizona Rookie League two years ago.

He batted .263 with 17 homers and 64 RBI in 123 games for the GreenJackets and was named to the roster for the All-Star Future Game.

Frank Micheli, president of the Azucareros del Este – Villalona’s winter baseball team – said he was aware someone was killed but that he had no further details.

Villalona will appear in court Monday and could face up to 20 years in prison if found guilty in the Saturday night killing of Mario Felix de Jesus Velete, police said.