Man accused of killing parents with hammer, knife, then calling 911 to confess: report

He then told authorities he would wait outside for officers, holding a water bottle, investigators said.

Officers later recovered a hammer and knife believed to have been used in the attack from a trash can inside the home, according to court records cited by FOX 10 Phoenix. Turk declined to speak with investigators after his arrest.

"We have concerns about his mental health and mental stability at this time," a prosecutor said during a court hearing.

Neighbors described the killings as shocking, though some said they had felt uneasy around Turk prior to the violence.

"I saw the mother, and she was normal and very kind," one neighbor told FOX 10 Phoenix.

"It was just a gut feeling. Like, a bad feeling. Like something was not right," the neighbor said. "I just always tried to walk on the other side of the street when I saw him out, and I just felt really uncomfortable because I have kids."

A friend paid tribute to the couple, writing that they are "struggling to understand such a senseless killing," describing the couple as "two beautiful souls" who had been married for decades.

"They were the definition of a model couple," the friend wrote on his Facebook. "They were an anchor of kindness and devotion… My heart is absolutely broken, and I will miss them beyond measure."