I am fairly certain that the report that they committed suicide is based on a series of observations of the NYPD. In my limited experience with the NYPD, they don't often state or leak things they don't have proof of. If this was, indeed, a suicide, I hope there is an investigation as to how these two young, apparently healthy women felt this was their only option. The questions I have about any cultural issue that might cause one or both to commit suicide are really only based on my limited knowledge and suppositions about them and their culture. If this was something other than suicide, say a murder/suicide or murder, I am hoping that is also being looked at with the full force of an investigation.
I am inclined in the same way that MadamX is. If this was a suicide, we won't really hear anything more about it.