How well can an android blend in?

One scene that i found particularly interesting in this novel is the one where Rick is arrested while attempting to administer an empathy test to Luba Luft. He is utterly confused when the policeman doesnt not recognize him or his superior and claims that Rick is not a bounty hunter. He is taken down to the station and booked on multiple charges. He is also shocked when he is taken into the station since it is not the one he is used to operating out of, and has never seen or heard of it before. He also does not recognize the police chief, any of the officers, or the bounty hunters from that station.When he attempts to call his wife, he dials his phone number and a random lady shows up on the screen. After talking to the police chief for a while, he finds out that the police chief as well as some of the officers are in fact androids posing as human police officers. Thew bounty hunter, Phil Resch, is not aware of this, and ends up killing the police chief when he finds out. I find it shocking that these androids could run a fake police station and have everyone, even a proffesional bounty hunter convinced that they are humans. Rick came very close to being killed that day, as did Phil, all because they could not tell that they were essentialy surrounded by androids. I also found it interesting that these androids are so technilogicallly advanced that they can pose as humans no problem, and run something like this without any humans, even the police being aware of what is going on. I just want to know, how did the SF PD not know about this at all or discover it?