Question

select the word or phrase that is redundant and can be removed without changing the meaning of the text. after new evidence came to light, the sheriffs department decided to repeat the investigation again.

Explanation:

The word "repeat" already means to do something again, so the adverb "again" adds no new meaning and is redundant. Removing it leaves the sentence's core meaning intact: the sheriff's department will conduct the investigation a second time due to new evidence.

Answer:

again