Detailed Explanation
The possibility that Henry—Jonathan and Grace's teenage son—killed Elena is one of the show's most disturbing false leads. Jonathan discovered that Henry witnessed the murder and manipulated the situation to create doubt about his son's innocence. The fact that Jonathan would let his own child be suspected of murder to save himself reveals the depth of his sociopathy. Henry is innocent, but traumatized by both what he witnessed and his father's willingness to sacrifice him.