An 82-year-old Maryland great-grandmother was bludgeoned to death by her 73-year-old neighbor — who turned herself in to cops, authorities said.

Hwa Cha Pak was discovered around 7:15 a.m. Sunday with upper body trauma in a garden in the back of her building in the town of Bladensburg, Prince George’s County police said in a statement.

Her neighbor, Chun Yong Oh, struck her multiple times with a brick following a dispute — and then called 911 to confess what she had done, authorities said.

Pak was pronounced dead on scene.

She was a great-grandmother of three who always prepared “a smorgasbord” of traditional Korean delicacies whenever her loved ones came to visit, her eldest grandson, Andy Kwon, told the Washington Post.

When Kwon initially found out that his grandmother had been killed, he thought, “Who in their right mind, or what kind of evil, had to creep up to take my grandmother’s life?”

He was shocked, he said, when he learned that another elderly woman had been arrested in connection with her death.

Oh has been charged with first- and second-degree murder, and is being held without bond.

Kwon said he and the rest of the deeply religious family will be keeping Oh in their prayers.

“God is our creator, and in the end, he judges us by everything we say and do,” he told the Washington Post. “Her judgment will be before God. We pray God will show mercy to her.”