"We found something different than what leading theories of emotional memory in adults say," Brainerd said. Those theories say that "When you're involved in a very negative experience of some sort, like a crime, it focuses your mind, and you really pay attention to details.
"But our research showed that exactly the opposite is true. By manipulating the emotional content of word lists, we found that materials that had negative emotional content in fact produced the highest levels of false memory. And when you add arousal to the equation, memory was distorted more."
Via Science Daily