This is a sin.  It poses questions about coding and fire safety and utility grading in old trailers like that in particular.  But that might involve government overreach,..so nooooo we can`t do that.  
If this doesn`t act in some way to better the safety codes and warning device requirements than it will be just a little more lost faith in my fellow man.  Lower income families have little choice but to accept vacancies in a city where rents and mortgages are extremely high.  This may sound like a desperate effort at laying blame.  It is.  All of us, for being so lax in coding for at least safe standards for old trailers like that one seemed to be.  There are far too many of them and far too many trailer fires. Fire alarms shouldn`t be an option in "mobile homes",.. most of which the wheels would fall off them if they tried to move many of them.  My heart goes out to all those who loved those kids.  In their names I hope something can be done code-wise. Managers can require alarms work?