Former MP Harvey Proctor has said he is "relieved" after he was told Operation Midland is closing and he will face no further action over allegations which he consistently denied.
Mr Proctor's lawyer Nabeel Gatrad told ITV News the investigation has had "far reaching consequences", including leading him to lose his job and having to move abroad.
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Flamur Beqiri was shot dead in front of his family outside their home in Battersea.
The chief executive had been with Sainsbury’s for 15 years and been instrumental in making big purchases including Argos and Habitat.
A marathon session of nearly 13 hours ended near 2am local time.