Incomplete question. However, I inferred you may be referring to the author of the story entitled, "Night" by Eli Wiesel.
Explanation:
Wiesel's use of short and incomplete sentences is done to connect his character's behavior to real-life scenarios in which one may speak rapidly and then temporarily go out of breath. Or it may reflect another similar real-life scenario in which one briefly pauses to think about what to say.
Consequently, this stylistic approach connects the story more to reality.
