I think it depends on the type of genetic material available, but Moran stated at the press conference that they were going to get the ball rolling right away on some other in response to a question.They did not announce it yet, but I think there are two new NCMEC reconstructions (for Body 10 and Body 13), not sure if it is somehow connected with the process of DNA extraction.
But according to another article:
Dart and lead investigator Lt. Jason Moran said they plan to use the new method, along with conventional investigative techniques, in other missing and unidentified persons cases. That includes trying to identify the five other unknown Gacy victims.
"This is our first case using genetic genealogy, so we wanted to make sure it was effective," Moran said. "This is the new one and we decided to use it, and it was successful."
How genealogy search and DNA helped identify latest John Wayne Gacy victim
- see around 28:55 / 30:00 for the exact exchanges.