When will the act of a third party break the chain of causation?
The chain of causation may be broken where a third parties independent and voluntary act becomes the main cause of the harm.
What happened in R v Pagett?
In R v Pagett the defendant used his girlfriend as a human shield during a police shootout, and she was killed by police fire.
The court held that the defendant remained liable because the police response was reasonably foreseeable.