Faked or not faked, from a purely technical standpoint there are some issues with the photo that prevent it from being used as evidence even if it were real.
#1 - its a non standard size, which indicates that its been resized and is not an original.
#2 - it has no EXIF data associated with the image. This data, if verifiable could lend to its credibility as a image that was photographed. This means it was likely an image taken with a phone and perhaps edited if for no other reason than to crop.
#3 - the uniform additive shading of the image lends to the theory that an image was overlayed or superimposed over another image with low alpha value. Alpha value being the property that makes the image less opaque.
Now I'm not going to say that anyone intentionally faked the image, simply because I can not definitively prove that. But at the same time the lack of verifiable aspects in this image precludes it from ever being used as evidence.