Looking at the story of Mr. S. in Episode 3, I won't believe his story. In other words, he is not a reliable source.
This is true because his description of his discovery of the body of Hae gives more reason why he isn't reliable.
What is "Serial"?
"Serial" is known to be a true-life story podcast and investigative journalism that actually looks into the mystery around the murder of Hae Min Lee, an 18-year-old girl. Adnan Syed, her friend was sentenced to life imprisonment because of the murder of Hae.
We see here that the story of Mr. S. cannot be believed because of the way he presented the discovery of the body of Hae.
Learn more about "Serial" on https://brainly.com/question/19588019
