Sins of the family

I wrote awhile back about a 7 year old, Aiyana Jones who was killed by police in a "no knock" raid on a duplex in Detroit.
To refresh everyone's memory, Aiyana was sleeping on her couch when a Detroit SWAT team threw a "flash-bang" grenade through the front window of her home. Some few seconds afterwards, the "point man" entered the home and fired his weapon which struck and killed this child.
I for one am outraged, and have been keeping an eye on the Detroit News and Detroit Free Press yet their coverage of the investigation has been weak, and overwhelmed by the numerous other murders happening in the city.
I can't understand why all the secrecy, and I further can't understand why it's been almost 2 months and this investigation hasn't been completed with a result. I read one article in June that allegedly placed her father in the vehicle of the perpetrator (who lived in the other half of the duplex) during the drive-by shooting that started all this.
Despite the possibility that her family was either directly or indirectly involved as accessories before or after the fact in the original murder, there was no reason an innocent child had to die.
I'm going to continue to keep an eye on this, and would ask others to question the motives of the Detroit Police in keeping this under wraps.
No child should have to suffer the sins of their family, and professional law enforcement officers should be held accountable for such an obvious abuse of power/force, and what was clearly poor tactical judgement.