John Robert "Jack" Welker (21 May 1953 — 7 September 2010) was an American Neo-Nazi gang leader based in Albuquerque, New Mexico, who was, at one point, the wealthiest criminal of the Southwest, after a series of events which led him to take Walter White's money.
Biography[]
Early life[]

Welker's nephew and partner Todd Alquist
Jack Welker was born on May 21st 1953 in the New Mexico capital city of Santa Fe. Welker's father was an accountant, and secretly, a Ku Klux Klan member, and he planted extremist ideas in his son's mind, leading to him becoming a white supremacist in the future. Welker had one sister who became a hopeless drug addict and slept with any man she could, some of which Welker would kill in retaliation. In the end, he took her son Todd Alquist out of her hands and raised him himself. Welker would go on to work with his nephew and desensitized him to violent acts such as murder.
Welker dropped out of college at age 16, although by then, he had already formed a small gang. Over the following years, the gang would perform small acts of vandalism in Santa Fe, until, in 1972, they got assaulted by a gang of drug dealers. Luckily for them, the police arrived in time, and they got arrested. They were obligated to pay a $4300 fine, and while Welker's father agreed to pay for it, that was his last act of kindness for his son, as he kicked him out of the house afterwards. Welker and his gang were unsure what to do afterwards, as they didn't have enough money to survive, but Welker thought about the gang of drug dealers who assaulted them, and figured that, even if it was risky, they could perhaps negotiate with them. They went to their hideout, and Welker talked politely to them, asking them if they could teach them to cook methamphetamine. While some of the dealers didn't agree, their leader saw potential in Welker, and agreed, becoming his mentor in the business. Little did he know, Welker was just using him until the perfect moment to kill him, when he would take over his drug organization.
An evolving business[]
In 1973, the Drug Enforcement Administration (DEA) was created, tightening the manufacture and traffic of drugs. This didn't stop th drug dealers' gang and Welker, who searched for a different, more discrete base of operations, a compound in the middle of the Albuquerque desert, where meth could be cooked. For the next 11 years there were no more records of Welker, except for in 1981, when he legally adopted his 2-year-old nephew Todd. It is known, however, that around this time, Welker started making more connections. He bribed cops more easily, implemented new members to his gang, such as Kenny Rankin, or Matt Lawrence, and around this time, his drug dealer friends gained access to military-level weaponry. It was then that Welker saw the perfect opportunity to strike. One night, when all the drug dealers were sleeping in the compound, Welker and his gang went outside with high-caliber rifles and shotguns. Welker shouted out to warn them, before his men opened fire. They murdered all 15 members of the gang, and acquired their business, which Welker would maintain for almost 30 years. They buried the bodies of the dealers out in the desert and their murders were never discovered. Welker also started to teach his nephew the ways of dealing.
Arrest[]
Welker continued to deal and sell drugs until December 22, 2000, when he and nine of his men got busted by the DEA during a business deal inside a warehouse. He got sentenced to 9 years in prison, during which time, his gang didn't weaken, as the remaining members, including Todd, took care of business.
Release and partnership with Walter White[]

Walter White asks Welker to murder Gus Fring's men in prison
Welker was released from prison on December 22, 2009, whereupon he was immediately contacted by his nephew for a job. Drug kingpin Walter White, better known under the alias "Heisenberg", was looking to get rid of Gus Fring's ten former employees, who had all been imprisoned but could still pose a threat as they could reveal secrets about their business dealings. Welker would do this within a two minute window as he had men in 3 different prisons who could murder them, and so they did. Dan Wachsberger, Ron Forenall, Jack McGann, Andrew Holt, Anthony Perez, Isaac Conley, William Moniz, Harris Boivin and Raymond Martinez were all shanked to death, while one, Dennis Markowski, was lit on fire. Welker informed White through the phone that the plan had been successful.

Welker as he's about to murder Declan Guerrero
Months later, Welker associated himself with Lydia Rodarte-Quayle in order to help recuperate his nephew's role as her main cook. After Declan Guerrero, a drug kingpin in Arizona, refused to hire Todd back on Quayle's suggestion, Welker, along with his men and Alquist himself, ambushed Guerrero and his men in a shootout. Welker personally murdered Guerrero with a shot to the head and then took all of his lab equipment.