Like others have commented, the plot is ok but some parts of the story just do not make sense. Since Sam knew that this was a murder case, why didn't she make a backup copy of the pictures? The last scene in the mall makes no sense at all. Why did Walker put the gun away......
The producers should have the story reviewed first before shooting the film and this may make the whole thing more convincing.
The producers should have the story reviewed first before shooting the film and this may make the whole thing more convincing.