The pair were found stabbed to death in Wembley, north-west London, in June.
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Two officers allegedly took "inappropriate" photos after discovering Nicole Smallman and Bibaa Henry's bodies in north-west London.
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The bodies of Nicole Smallman and Bibaa Henry were found in Fryent Country Park in Wembley, north-west London, in June.
The force's commander said he was "horrified and disgusted" by the allegations.
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Police have released new photos of Bibaa Henry and Nicole Smallman taken in the Wembley park on the night of the fatal stabbings.
A murder investigation was launched after the bodies of Nicole Smallman and Bibaa Henry were found in Fryent Country Park, Wembley, on Sunday.
The deaths of Nicole Smallman and Bibaa Henry in Wembley, north-west London, are being treated as "suspicious".
Police are appealing for more information about a white Nissan SUV which failed to stop at the scene.