Jeffrey Dahmer’s brother David looks unrecognizable as he’s seen for first time in years having assumed a new identity

JEFFREY Dahmer's brother David has been pictured for the first time in decades after details about his tense relationship with the serial killer emerged this week.

The Milwaukee Cannibal's younger sibling, 56, looked unrecognizable as he was seen near his home in the suburb of a major US city, which The U.S. Sun has decided not to reveal.

David, a father of two, has been living there under a new identity.

While running errands, David sported a full orange tracksuit reminiscent of his older brother’s infamous pictures in a prison jumpsuit.

"I don’t know what you're talking about," he told The U.S. Sun when approached outside his home and asked about his brother.

He then threatened to call the police and headed back into his apartment building.

DOMESTIC DIFFICULTIES

The photos come as a new documentary released earlier this week about Jeffrey Dahmer's relationship with his father Lionel revealed the tensions between the murderer and his younger brother.

The brothers had issues while growing up together as they competed for the love of their late mother Joyce, retired FBI profiler Dan Craft said in an interview for the Fox Nation docuseries My Son Jeffrey: The Dahmer Family Tapes.

Craft, who interviewed Dahmer and profiled him three times for the FBI, told filmmakers: "Jeff ended up resenting David because his mother favored David, would show him the love.

"I found that to be, you know, abusive.

"He (Jeffrey) just didn’t feel that he mattered, so that can be very powerful, especially for a child in those formative years.

"You don’t think mama loves you, it can be pretty devastating."

Dahmer murdered and dismembered 17 young men and boys in Ohio and Wisconsin between 1978 and 1991.

Many of his gruesome later murders involved cannibalism, necrophilia, and the preservation of victims’ body parts.

The serial killer was beaten to death with a metal bar by a fellow inmate while serving a life sentence at Columbia Correctional Institution in Portage, Wisconsin. He was 34.

NEW DOCUMENTARY

The new Fox Nation documentary revolves around never-before-heard tapes of conversations between Dahmer and his dad Lionel, 87, while Jeffrey was in prison.

It tells how the future murderer grew up in a broken home after his parents divorced in 1978.

Describing his upbringing, a source close to the Dahmer family told The U.S. Sun: "To my understanding, Joyce favored David because David acted and looked more like her.

"He was more like Joyce in their personalities than Jeff was.

"She was an alcoholic, as was Jeff in later life.

"But her mannerisms were more like David, who was more outgoing and talkative than his brother.

"Jeff was more like Lionel, he was more reserved and thought things through, or at least when he was younger it seemed that way.

"When Joyce took off with David after her marriage with Lionel ended, Lionel only had Jeff to dote on.

"Jeff reminded Joyce of Lionel and that’s one of the reasons why she didn’t take Jeff with her after the divorce."

Lionel stood by his son after he was convicted for his crimes and went to prison.

The U.S. Sun revealed last year that Lionel is "still p****d" over his son’s brutal murder behind bars by fellow inmate Christopher Scarver.

Earlier this year The U.S. Sun also revealed that Lionel’s second wife and step-mom to Jeffrey and David, Shari, had passed away at aged 81.