Is Ethiopian police covering up the gang rape and murder of Hana Lalango?

I watched the following heart breaking report by the Ethiopian Police on EBC (formerly
called ETV) today. As a survivor of sexual assault myself, I could not help but try
to get more information and ask the following questions: 

1. Hana was recovering well after she was admitted in hospital, but suddenly she was found 

dead. The family suspect that she was poisoned in the hospital. Is the family allowed 
to have an autopsy done by an independent expert to find out the cause of her death? 

2. Why didn't the report mention that Hana was taken by her kidnappers to a shisha
 house that is frequented by government officials? 

3. Why didn't the police report mention the fact that Hana's friend who tricked her
 into going to the shisha house where the gang rape took place is still not in police 
custody? Is it because she could name the real rapists and expose other rape
 incidents that she facilitated? 

4. Why didn't the police talk about other shisha houses in several parts of Addis Ababa
that are being used to lure teenage girls and rape them? Is it because many of the 
rapists are police officers and government officials? 

Rape is common in today's Ethiopia because many of the perpetrators are powerful people.
In Hana's case, the taxi driver and a couple of other individuals may be punished, but the
real culprits will walk free.