Stepping Hill: Complex hunt to convict killer nurse

A nurse has been convicted of murdering two patients and poisoning 20 others at a Greater Manchester hospital.

Greater Manchester Police say the investigation which led to Victorino Chua's arrest and conviction was one of the the biggest and most complex it has ever carried out.

Officers flew to Chua's native Philippines, where their investigations cast serious doubt over his medical qualifications.

Health correspondent Sophie Hutchinson reports.