Nothing coming out of SS's mouth is credible, LE has said he is in fact the murderer and that wouldn't be stated without evidence to back it up.
Considering that person(s) in adjacent bedrooms only reported hearing some nondescript noises, not talking, yelling, arguing, doors, etc, I don't think it possible.
It is important to note, SS told his parents he was on a walk, and came back to find MS already "cold". He doesn't accuse anyone of the murder, just says he wasn't there , which may be disproved by his Fitbit. He didn't leave in the heat of a verbal argument which would have been heard by others.
The victim was strangled, seeing how SS left evidence everywhere, including that which is on his phone and Fitbit, I am confident that forensics will give/show us that SS was a rapist and murderer.
I doubt he wore gloves. I am sure that the autopsy was able to find his skin cells in the damaged tissue/bruising around her neck, nothing so far has pointed to a ligature.
Two other things to consider:
"A warrant revealed that Sterns searched “sevoflurane” on
multiple dates. Sevoflurane is an anesthetic used during general surgery."
"A roommate who lived in the home with Jennifer, Madeline and Sterns described Sterns’ behavior on the morning Madeline was reported missing as “odd.” She said she saw him going up and down the stairs, going in and out of the home, and “was also washing clothes, which she has never seen him do.”
New documents are offering new insight into Jennifer Soto's relationship with Stephan Sterns, who she called a 'master manipulator.'
www.courttv.com