Husband paid £1,000 to kill his wife because he was having an affair with her sister

Mother-of-two Amina Bibi (left) was stabbed at least 70 times at her flat in Forest Gate, east London (bottom).
Husband Mohamed Ali, 65, (right) was heavily in debt and having an affair with his sister-in-law in Pakistan when he approached drug addict Frederick Best, 47 (inset). Mrs Bibi had significant savings in the house and officers believe the debt and affair could have been a motive for Ali to have his wife murdered. On the day of the killing the killer was disturbed by Bibi's 11-year-old son who had returned to fetch his homework and found his mother dead.

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