EXCLUSIVE Bashid McLean allegedly dismembered his mum and dumped her in the trash in the Bx.

A schizophrenic South Bronx man confessed Tuesday to dismembering his mom and scattering her body parts in garbage bags across the South Bronx, police sources said.

Deranged suspect Bashid McLean, 23, implicated himself in the gruesome death after investigators recovered a saw inside the apartment where he lived with victim Tanya Byrd and his 7-year-old brother, Nasyr.

Tanya Byrd

A bag stuffed with human body parts, believed to be Tanya Byrd, was discovered on a Bronx street around 5 a.m. on Tuesday, Feb. 26, 2013.

Cops also found a shopping cart used to lug 52-year-old Byrd’s severed body parts from their home to four locations within walking distance of the murder scene, police sources said.

Byrd was terrified by McLean, who was on probation after coming at two cops with a knife in 2010, and suspected that he was battering little Nasyr. The younger brother has Down syndrome, according to one neighbor.

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Barry Williams/For New York Daily News

A witness told cops that the suspect fled into the pre-dawn darkness in a silver SUV after tossing the remains into a pile of garbage bags.

“I wouldn’t be at all surprised if Bashid killed her,” said a 43-year-old woman who lives in the building on Westchester Ave. in Melrose. “She was afraid of that boy. . .He was a hellion.”

When bruises began appearing on the special-needs child, Byrd suspected her older son, the neighbor said.

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Barry Williams/For New York Daily News

The victim’s head, hands, torso, legs and shoulder were all pulled from the trash

“Bashid had a problem controlling his rage,” said the neighbor. “He had creepy eyes. Didn’t like to look you in the eye — but when he did, they went right through you.”

Although McLean called police to report his mom was missing, he quickly emerged as a suspect in the gruesome killing, police sources said. Cops were questioning him at the 40th Precinct stationhouse late Tuesday.

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Barry Williams/For New York Daily News

Investigators examine a crime scene on Eagle Avenue in the Bronx on Tuesday.

McLean’s sister, Porsche Lovett, who visited him at the stationhouse, said he showed no remorse. “He looked me in the eyes and told me he did nothing wrong when he killed her,” she said. “I don’t know who he is.”Byrd’s body parts were stuffed in garbage bags and scattered throughout her neighborhood, with a dog walker spying her right leg protruding from a pile of garbage around 5 a.m., police said.

Three heavy-duty plastic garbage bags stuffed with body parts were found nearby.

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Barry Williams/For New York Daily News

The victim’s remains were taken to the medical examiner’s office for an autopsy and positive identification.

The victim’s head, hands, torso, legs and shoulder were pulled from the trash bags, the sources said.

The brutal killing left McLean’s family members reeling — despite Bashid’s history of aggression and mental health problems.

“He did destructive things,” said his father, James McLean. “He set fires; nobody could control him. ”

The dead woman’s sister said Bashid nursed a grudge against Byrd over his placement in foster care while his mom battled a drug problem. They reunited when he turned 18.

“I want people to know my sister was a good mother,” said Cassandra McLean. “She always took care of him.”