Is that established? All I see is that the building manager refused comment and the management company didn't pick up the phone.
Seriously, speaking as someone who managed an apartment building in California for a few years, I'll bet you money that this is all strictly on auto-pilot. The on-site manager collects the rents and checks boxes next to the names on a list but is essentially powerless. That list goes to the management company on the third of the month. There's no box for "Tenant was murdered last week." The management company, which runs scores if not hundreds of other apartment complexes, only sees the rent hasn't been paid on that unit and automatically generates the three-day "Pay Rent or Quit" paper, which they send to the people named on the lease. Nothing really sinister or callous, just bureaucratic.
Think it through. If the daughters left January 13th and the ex had been arguing for 2 weeks, they knew in December BEFORE the rent was due. And the ex has a lawyer named Nord. He must have gotten into it too. Please, read the article. This Santa murder was all over the news, are you saying that you honestly believe it escaped the landlord and management company’s notice?
Okay, that makes sense.