Robert Lee Yates, Jr. (born May 27, 1952) is an American serial killer from Spokane, Washington. From 1996 to 1998, Yates is known to have murdered at least 13 women, all of whom were sex workers working on Spokane's "Skid Row" on E. Sprague Avenue.
Francisco de Assis Pereira (born November 29, 1967), also known as "O Maníaco do Parque" ("The Park Maniac"), is a Brazilian serial killer. He was arrested in 1998 for the rape and murder of 11 women and for assaulting nine others in a São Paulo park.
But let´s not forget about Paul Ogorzow, John! He should suit both you and me:
Known as the "S-Bahn murderer"; SA sergeant convicted of raping and murdering eight women by throwing them off trains in Berlin during blackouts in 1941 and 1942. Executed by guillotine at the Plötzensee Prison on July 26, 1941.
So he used local Berlin trains to kill eight women. How EXTREMELY stupid - he gave away the exact platform (excuse the pun) he used for killing, which is exactly what I am saying - these men will often enough kill in VERY confined areas.
The upside for you - is that he definitely had transport!!