What do Stephen Smith's injuries tell about the SC teen's death?

"48 Hours" obtained exclusive access to the findings of an independent investigation into the unsolved death of the South Carolina teen, whose case was linked to the Murdaughs.

source https://www.cbsnews.com/news/stephen-smith-south-carolina-unsolved-death-48-hours-new-findings-revealed-in-case-linked-to-murdaughs/