An Alabama man is behind bars accused of killing his own son because he had physically abused his 12-year-old granddaughter.

The incident began on February 21 when Mark Hall, his daughter, and the girl’s grandmother were returning home from a softball game in Mobile, Alabama.

During the drive home, Mark, 41, reportedly received a phone call regarding his daughter. Though it is not known what information Mark received about his daughter during that phone call, it caused him to become upset and begin striking the child inside of the vehicle, AL.com reported.

Authorities said the striking continued until they arrived at Mark’s parent’s residence in Rabun. Once there, Mark stated he was planning on taking his daughter to back his house, which is located directly behind his parent’s residence.

That’s when Mark’s father, 64-year-old Hubbard Junior Hall, intervened and said he didn’t want Mark to take the girl with him.

A confrontation ensued when Mark attempted to leave with the girl, at which point Hubbard allegedly grabbed a .25 caliber handgun and shot his son once in the left side, AL.com reported. Officers with the Baldwin County Sheriff’s Office arrived at the residence just after 8 p.m. and found Mark on the floor suffering from a gunshot wound.

“Apparently the discharged bullet hit [Mark’s] rib cage and ricocheted into his chest cavity, where it caused severe bleeding,” Baldwin sheriff’s Capt. Stephen Arthur told PEOPLE.

Mark was transported to a local hospital, where he was pronounced dead upon arrival.

Hubbard was arrested and charged with his son’s murder. He is being held in custody on $100,000 bond.

[Feature Photo: Baldwin County Sheriff’s Office]