Man charged with father's murder after family found unconscious in Queens

A man acting erratically was arrested in Queens Village Thursday after his 72-year-old father was found dead and three family members were discovered unconscious on a mattress inside an apartment, according to the NYPD.

Police responded to a 911 call at 6:29 a.m. about the emotionally disturbed man at 221-15 Hempstead Avenue.  The man, identified by police as Jaimie Walker, 30, told cops he had injured people inside the apartment, said Asst. Chief Joe Kenny.

Once inside, police found Loandows Walker lying on the floor in a bathroom with stab wounds throughout his body. A 70-year-old woman believed to be the suspect's mother, a 31-year-old man believed to be his brother, and a 29-year-old woman believed to be the brother's wife were found unconscious on the mattress in the living room. 

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It was not clear why the victims were unconscious. There were no apparent injuries on the victims. They were taken to Long Island Jewish Hospital in critical condition.

"There were no elevated CO2 levels in the apartment," said Kenny. "Additionally, the NYPD Emergency Services Unit took air samples and did not find any irregularities."

Jaimi Walker was taken for a psych evaluation. He was later charged with murder and criminal possession of a weapon.

An investigation was underway into the deadly incident.