The alleged mastermind behind the 9/11 attacks may agree to help victims' families open a lawsuit against Saudi Arabia, if the US doesn't seek the death penalty against him, Mirror reports.
Khalid Sheikh Mohammed's proposition was revealed on Friday in New York, when victims' families spearheaded a federal lawsuit against Saudi Arabia over the 9/11 terrorist attacks.
The lawsuit accuses the Saudi Government for helping to coordinate the 2001 attacks which killed nearly 3,000 people at the World Trade Centre.
However, Saudi has denied their involvement in the attacks.