Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: The case of Nat Fraser - accused of murdering wife Arlene - is "blighted by hindsight and assumption", a court has heard.

Nat Fraser trial: Defence QC says Arlene murder case 'is difficult'