Students at a top university burst out laughing in the middle of an exam when they realised the answers were stapled to their test papers.
The first year exam turned into a shambles after a printing error resulted in the paper's mark scheme being attached to the back of the questions booklet.
It gave first year students the answers to the complicated test for 40 Electrical and Information Engineering pupils at Imperial College, London.
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Police said while he was on the overbridge in the station, he met someone who immediately pulled out a knife and stabbed him.
Police scrambled to East Croydon station on Monday following a report of a stabbing.
Kristian Smith continued to live in the one-bedroom flat and used Antoinette Donegan's bank card and mobile phone as she lay dead.