On Wednesday, a 15-year-old Mason High School student was arrested at his home after his parents found a revolver in his bedroom.

School officials then found written threats - though not directed toward anyone at the school - in the boy's locker.

Troy Nelson, a Mason High School Police Officer, said two Mason Middle School students, and another 15-year-old high school student, were charged Friday in connection with the discovery of the gun.

Nelson said one of the 14-year-old eighth-graders, has been charged with theft of the gun from his home and the other has been charged with receiving stolen property.

The freshman arrested Friday is also charged with receiving stolen property.

"The gun was stolen by one student, given to another, who then took it to another who ended up giving it to the first boy who was arrested earlier," Nelson said.

Of the four boys, only the 15-year-old who was arrested Wednesday is in custody at the Warren County Juvenile Detention Center in Lebanon on charges of receiving stolen property as he awaits a preliminary hearing. That teen has also been suspended from school and faces an expulsion hearing.

The three boys charged Friday were summoned to a juvenile court hearing next week, Nelson said.

Officials from both the high school and middle school sent a letter home Wednesday notifying parents about the situation and assuring them that no weapon was taken to the schools, nor were threats made against students or staff.

Nelson said the latest charges are expected to be the last ones made in the case.

E-mail mclark@enquirer.com