Do you know who Michael Hoffman is?
Did you now that at least 2 people opened their window at 3am to chase the killer off? He ran off during this time; only to reappear and attack again. The rest were woken up from deep sleep to peer out the window - and saw nothing. The poor girl had limped around the corner. The main villain of the apartment dwellers was the asst. super who declined to call the police. (In those days, we had no 911 - your 999, I think.) People had to scramble for their telephone books, look up the number which is generally hard to find in the way our phone books are constructed. Some did call in to the police.
38 people - actually 49 originally - were interviewed; they were not witnesses just people who lived on both sides of the street. There were only two genuine witnesses who saw the stabbing. One thought it was a punch not a stab, I believe.
Given this situation, I do not believe the second murder you cite was any different. Did it not occur to you that once it came on the police blotter that a murder had occurred in the same location, that reporters would rush to the scene and recreate the scenario? That's what reporters do: they look for a hook. You live in a country that also has a tabloid culture so you should know this.
Also, since you admit you really know nothing about living in this country, you should know that in 1965, NYC was still a relatively safe city to live in. We still had Mayor Wagner. It's possible that people in the apartment didn't even think that a murder was occurring. (Some thought it was two drunks.) Ten years later, the city was at an all time low and people were much more aware of street crime.
My knowledge of ludicrous European interest in crime & poverty comes from my youth as a NYC tour guide - the German tourists used to demand a tour of the South Bronx rather than Greenwich Village. Over and over again. Too stupid to even realize that all tours were preplanned and we couldn't go into Brixton...er, the South Bronx.
You like to study American crime statistics - I like to read about English kings. Yeah, I guess we differ.
Yes, I am. Simply because I see the case differently from you dosent mean you have to insult my knowledge of the case. I am well read on the case, have read every book and article on it that I can, watched all documentaries, and as I said I am very well versed on American crime and murder, as well as US history and culture.
So, yes, I could go through the murder point by point.
I lived in the US from May 2004 to Aug 2005 actually, in Kissimmie, Florida, working for a British travel company. Some trips back to the US for a week at a time, but most of that 15m period was spent in the US. Managed to travel briefly to San Diego, Washington, Atlanta and NY on business. So I have some grasp of US life and culture first hand. Some.