I dont believe for a second that this was only his second time committing murder.
DNA testing revealed that his genetic profile was a perfect match for the murderer of 28-year-old Genevieve "Jenny" Zitricki, who had been bludgeoned, raped and strangled with pantyhose at her apartment in Greenville, South Carolina, on April 5, 1990.[5] At the time, it had been established that after murdering her in the bedroom, the killer had dragged her body into a bathtub and submerged it, before writing "don't




with my family" on the bathroom's mirror.[2] A DNA sample belonging to the perpetrator was isolated in 1995, and then uploaded to CODIS. Investigators were able to establish that at the time of Zitricki's murder, Brashers was living in Greenville, not far away from her home.
en.m.wikipedia.org
There were either victims before Jenny, or victims between Jenny and the Yogurt Shop Murders imo.