Bane drew blood as part of a calculated plan to fake the death of a nuclear scientist during the opening scene of The Dark Knight Rises. This act was essential to make the staged fatality appear convincing.
According to the reference provided, in the opening scene:
The Deception in the Sky
- The scene depicts Bane and members of the League of Shadows orchestrating a daring mid-air operation involving a plane crash.
- Their primary goal was to kidnap a nuclear scientist.
- Crucially, they needed to make it appear as though the scientist had died in the crash, rather than being abducted.
How Blood Was Used in the Plan
To achieve this elaborate deception, they utilized blood transfusions:
- Blood was drawn from the living scientist they intended to kidnap.
- This blood was then transfused into a deceased body present on the plane.
As the reference states, this was done "so that his death would be more believable." By placing the scientist's blood into a corpse found among the wreckage, they aimed to mislead investigators into believing the scientist had perished, leaving no trail of his actual kidnapping.
In essence, drawing the scientist's blood was a vital step in creating forensic evidence designed to support the illusion of his death, thus hiding his capture.