Randall Woodfield, the I-5 Killer who killed up to 44 people was drafted by the Green Bay Packers in the 17th round of the NFL Draft but was cut from the team during training after a series of indecent exposure arrests.
Scottish serial killer Dennis Nilsen once killed a man with a headphone cord, before listening to music on those same headphones. Later in his life, he found a guy outside, clearly disoriented. He called an ambulance and the guy was brought to the hospital. The guy came back the next day and thanked Nilsen, after which Nilsen killed him.
Russell Williams was the commander for Canada's largest airforce base. He flew dignitaries like the Prime Minister and Queen Elizabeth around. He also broke into homes to steal women/girls underwear and took selfies for years until he progressed to rape and murder.
Cody Legebokoff is one of Canada’s youngest serial killers (Age 19/20) - killing 3 women and a teenage girl. When he was caught in Late November 2010 covered in blood, he claimed he clubbed a deer to death because “I’m a redneck, that’s what we do for fun.” The only reason he was caught that night was because of erratic driving and after his explanation the lack of hunting permit in accordance with the Canada Wildlife Act. The blood trail led to one of his victims, and then Legebokoff’s DNA connected him to his 3 previous victims.
Richard Chase was a serial killer who would only go into people’s home if their front door was unlocked because otherwise he “didn't feel welcome.” He believed he was a vampire and thus he could not go into a home if it was locked, which is a part of vampire mythology.
Albert Fish would stick needles into his pelvis when he was masturbating. He would stick them so deep sometimes they would get stuck. When he told this to police, they didn't believe him until they saw the x-ray of needles still embedded in his pelvis. He had children of his own, and was by all accounts a very kind and gentle father, and never even raised a hand on his own kids. He cooked and ate a little girl once and then sent a letter to her parents about what she tasted like.
Robert Hansen would kidnap women and turn them loose in the Alaskan wilderness, where he would then hunt them down like animals and kill them. He didn't have the highest number of victims, but his method of hunting them for sport is absolutely insane.
Serial killer Ed Kemper was a prolific audiobook narrator and he has several hundred completed recordings to his name. He buried one of his victim's severed head in his mother's garden as a joke and later remarked that his mother “always wanted people to look up to her.” He also once accidentally brushed his hand against one of his victim's breast and apologized then attacked and killed her.
Ted Bundy helped in the investigation of the green river killer and made a psych profile which ended up being closer to the actual green river killer than the FBI's own psych profile. That was also a huge part of the inspiration for the silence of the lambs. Bundy also tried to masturbate to photos of his crime scene when detective Kepple brought them in, which is why they stopped letting Bundy keep the files.
Tom Tobin was a famous American mountain man, and bounty hunter. In 1863 Tobin hunted down one of America's first serial killers, Felipe Espinosa, who killed 32 innocent civilians before Tobin single-handedly decapitated him and his accomplices. Tobin was paid with a Henry rifle for the killings.