A man suspected of shooting his wife to death at an upscale hotel in Dallas, Texas on July 29 is now in police custody.

Peter Noble Nicholas III, 30, was found covered in blood when he opened the door of his room at Hotel ZaZa for responding officers.

Police found the body of his wife, Jacqueline-Rose Parguian Nicholas, 32, with an apparent gunshot wound.

According to an arrest warrant affidavit, two security guards went to the couple’s room after receiving complaints about loud noises, but no one answered.

A 911 caller told a dispatcher of a woman screaming and possibly high on drugs.

While Dallas Fire-Rescue was on its way, the caller then reported that the woman was threatening to kill herself.

Dallas Fire-Rescue arrived at 10:25 p.m. but waited for police to arrive as per policy, according to The Dallas Morning News.

At 11:29 p.m., the guards heard a gunshot and a man screaming “Oh my god,” followed by “crashing sounds from inside the room as if items were being thrown around and/or broken.”

Police arrived at 11:32 p.m., more than an hour after the 911 call. They found Nicholas “partially covered in blood” with an extension cord coiled around his neck.

The suspect, who appeared to be on drugs, initially cooperated but began resisting officers later. He was subdued with a stun gun before being transported to a hospital.

Police recovered a handgun from inside of a backpack in the hotel room. The victim’s mother, Tess Parguian, said that her daughter “could still be with us” if only authorities responded immediately.

“They could have rushed in there in an instant and saved my daughter. I’m in shock, my body shakes, and my heart is broken,” said Parguian, who is currently in the Philippines, according to WFAA.

Parguian claimed that she has never heard of violence between her daughter and son-in-law. She is now left to raise their two sons, aged 8 and 3.

“Peter is a nice young man. He’s very polite, and that’s why I cannot believe he could do such a thing,” she added.

The couple had been married for eight years. Peter worked as a DJ under the stage name Pete Mash.

A GoFundMe page has been set up to raise money for Jacqueline’s funeral and her children. “I never imagined that this would happen to her,” Parguian said.

Images via Facebook / Jacqueline Rose Nicholas