Having followed true crime all my life I have never heard of a murder in which the perp wore a wet suit, hazmat suit, or forensic booties. But anything's possible, I guess. Zodiac wore a freaky costume & mask at Lake Berryesa.
JMHO
There are a ton of examples where killers use protective apparel as a forensic counter measure. Here are a few off the top of my head:
Hollywood Ripper, wore forensic booties: The Chilling Details of the Murder of Ashley Ellerin and the "Hollywood Ripper" Trial - E! Online
Jake Patterson, abducted Jayme Closs after murdering her parents. Shaved his head to prevent forensic evidence: Accused Jayme Closs kidnapper shaved his head so he would not leave hair behind at her home, authorities say
Daniel Marsh, 15year old who duct taped his shoes and left virtually no forensic evidence after stabbing an elderly couple to death: https://en.wikipedia.org/wiki/Murders_of_Claudia_Maupin_and_Oliver_Northup
Every time I think the Moscow killer had to be super organized and experienced, I remember all the not-that-bright murderers who are able to successfully kill without leaving much forensic evidence behind. Some basic google searches or watching murder docus is really all people need to be able to take pretty extensive preventative measures in regards to leaving evidence...