Grandma found buried in concrete was tortured for hours by handyman with nail gun

The Washington grandmother whose body was found buried under a shed suffered a painful, hours-long death — in which she was tortured with a nail gun, authorities said as her sex-offender handyman appeared in court over her murder.

Marcia Norman, 82, was bound with Velcro straps and beaten to death while also being injured with a pneumatic nailer, Thurston County Coroner Gary Warnock said, calling it the “worst case I’ve witnessed.”

“Her onset from injury to death was not instant. It was hours,” Warnock said, according to NBC News.

”We see and witness things, and this investigation is one you cannot unsee.”

The disturbing details emerged as Norman’s handyman, Jeffrey Zizz, 47, appeared in court Monday, a day after he was arrested on suspicion of murder, kidnapping and unlawful disposal of human remains

The child-molesting veteran, a father of five, is being held without bail and is expected to be formally charged on Wednesday, the reports said.