Original sentence: In a BBC documentary produced in 2018 it is argued that Jones is a prime suspect in an unsolved series of murders committed by a perpetrator known as Jack the Stripper, who is thought to have murdered a minimum of six women in the mid-1960s
Edited sentence: In a BBC documentary produced in 2018 it is argued that Jones is a prime suspect in an unsolved series of murders committed by a perpetrator known as Jack the Stripper, who is known to have murdered a minimum of six women in the mid-1960s