Some cases i wanna mention.
I made a post in a different thread about a series of 8 murders that occured in Nassau county from the mid to late 80s.
Ive noticed 3 of them occured in 1989, and bore some resemblance to RHs other killings.
1) in June 1989, the body of Genise Wilder was found behind an electronics store in Hempstead NY.
Genise was found with multiple stab wounds to her upper body. Her clothing was disheveled.
While the location of the body is a lot more urban then RHs known victims, there are similarities between her murder and Sandra Costillas.
Sandras shirt was pulled over her head, Genise’s clothes were described as disheveled.
Sandra's body suffered post mortem stab wounds, Genise was stabbed multiple times. I am unsure if those wounds were inflicted post or pre mortem.
2) Carmen Vargas was found deceased off the side of the Meadowbrook parkway.
This article discusses the similarities between this case and some of RHs other victims
The 29-year-old’s body was found dumped on the side of the Meadowbrook State Parkway in Freeport that summer, about 7 miles west of Heuermann’s Massapequa Park lifelong home.
nypost.com
3) On Dec 13th 1989, the body of 23 year old Christine Warner was found in a wooded area of the Meadowbrook Polo club. She was completely nude and wrapped in plastic bags.
She was a known sex worker who often worked in Manhattan. Much like Sandra, she was was beaten, but ultimately died of strangulation.
All victims mentioned above besides Sandra, have known ties to sex work