Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A young Australian man preparing to give evidence against men he claims bashed him in a Thailand nightclub last year found himself behind bars and forced to post bail. Jack Hansen-Bartel, 21, was at court on Friday as a the hearing against two Asian-American students accused of attacking him got underway. However, when Mr Hansen-Bartel arrived in court, he was taken arrested under charges of assaulting the two students without causing them any physical or psychological harm and of disturbing the peace. Mr Hansel-Bartel's mother, Annie, said being arrested and jailed had traumatised her son, according to the AAP. 'It's really difficult,' she said.Jack Hansen-Bartel in court for hearing of two men he says assaulted himMr Hansen-Bartel jailed on counter-charges filed by men's own lawyersFamily describe arrest as a 'ploy clearly tactical in nature' by defendantsMr Hansen-Bartel was hospitalised last year after attack in a Thailand bar 
 Question:There had been reports the families of the men who allegedly attacked Mr Hansel-_ have attempted to influence the case, with a public prosecutor assigned to the case having to be replaced amid allegations of irregularities.

Bartel