I'm not defending this mistake but, you guys need to realize that this seems very simple but sometimes isn't. In areas that are high drug areas, the residents commonly change the address or remove them. Also, apartments can at times very very weird as to how they number the buildings and apartments.
Agents can't go into these places and screen them for the raid, it will give it up as they commonly have video cameras hidden for counter surveillance. They also have people posted to alarm the drug dealers that something is going down. They have guard dogs and other very clever security.
I'm almost certain that the FBI is capable of obtaining city records that would indicate the exact location of each apartment, including every window, electrical outlet, water supply line, etc, especially when they dedicate two years to an investigation.
The agents are often working off of information provided by a confidential informant who themselves are total scumbags and addicts. They provide bad information occasionally.
Again, the investigation was conducted over a period of two years. Based on your theory, God forbid they ever have to take any action with 24 hours.
At least they didn't shoot the dog.
That was the reason I posted this (Germans) article.
They will pay her a shitload of money and some agent's career will be ruined as a result.
With mistakes like this, do you really think the agency and the agent in charge of the raid shouldn't be held accountable?