Here’s the updated story from the Post...
“Authorities believe Sumpter, who has been linked to the murders of two women in Boston since his death, one in 1972 and another in 1973, entered Britton’s apartment through an open window. A nearby resident reported hearing someone on Britton’s fire escape prior to the killing, Ryan said. But like his other two victims, investigators don’t believe Sumpter had any significant connection to Britton.
Sumpter, who was convicted in the 1975 rape of another woman at her Boston apartment, had lived in Cambridge as a child and was familiar with the city, Ryan said. He was also involved with the city’s police department as a juvenile, she said.
Investigators were also able to place Sumpter working in Cambridge less than two years before Britton’s murder and he was arrested and convicted of raping a woman at a bar in Boston just blocks from Britton’s apartment in 1975, Ryan said.
Sumpter died of cancer at age 54, some 13 months after he was paroled to hospice care for the 1975 rape, Ryan said.
Investigators were ultimately able to link Sumpter to Britton’s murder last year “strictly thanks to forensic development,” Ryan said, adding that advanced DNA testing from the original evidence collected from Britton led to a match in a national law enforcement database.
That led investigators to obtain a sample from a male relative of Sumpter’s and Sumpter was identified as the killer, while excluding several other people once considered to be suspects, authorities said.
Sumpter’s male relative ultimately was tracked down with the help of genealogy websites like Ancestry.com and was cooperative with investigators. Sumpter, meanwhile, has now been posthumously connected to five sexual assaults, three of which were fatal, Ryan said.”
https://nypost.com/2018/11/20/dna-evidence-leads-to-closure-in-1969-cold-case-murder-da/
Too bad he’s already dead.