“We can never be satisfied as long as the Negro is the victim of unspeakable horrors of police brutality.”
Explanation:
Metaphor is a picture of language. It is widely used, in speech and writing, to establish a transference of meaning from one word to another, from non-explicit comparison. With the metaphor, it is possible to compare without having to use a connective, (for example “how”), which could fit naturally into the sentence.
We can see the use of the metaphor in the phrase "We can never be satisfied as long as the Negro is the victim of unspeakable horrors of police brutality." Where the negro was implicitly compared with a victim.