According to the text, when both the public and other professionals within the justice system have unrealistic expectations of investigators’ abilities, law enforcement agencies are said to be suffering from what?

"CSI Effect " would be the correct approach.

Explanation:

The CSI effect seems to be a concept used mostly for believing that modern Television gangster movies with such a focus on forensics, DNA testing, and many more ability to affect jury members throughout real-life life.  In particular, it is the sentiment shared by certain attorneys that members of the jury who are seeing these tv programs have unreasonable standards about either the quality and number of corroborating analysis which might or will be entered into evidence.

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