Hassan Saeed was arrested during February's state of emergency.
The girl was assaulted last Thursday.
Ishag Ali and Hussain Afeef were suspected of links with the Islamic State terror group.
The teenage victim is in critical condition after he was stabbed inside his house.
Amjad Musthafa is alleged to have insisted on sleeping in the same room as two female employees.
Lahiru Madhushanka has also been denied a fair trial, the rights group says.
Mohamed Nasheed said he would return to the Maldives on November 1.
Amjad Musthafa denies the allegations.
More than 50 assault cases have been reported so far this month.
Concluding pre-trial hearings, Judge Ibrahim Ali also granted the prosecution's request to seal evidence.
The company that printed ballot papers alleged its staff were offered bribes for false testimony.
Muhthaz Muhsin and Ahmed Nihan were jailed over an alleged attempt to kidnap the president.
The slain blogger's family was allowed to attended a hearing for the first time.
The 14-year-old boy was stabbed to death amid a spike in gang violence.
The bribery charge was the president's justification for February's state of emergency.
Ibrahim Muaz Ali called EC members "thieves" at the ruling party's nightly protest.
The victim was rushed to hospital by members of the public.