There are different degrees of murder. First degree requires you to plan in advance kill someone (either particular person or a specific group). Second degree murder doesn't require the plan to kill, and so negligence for financial gain COULD be second degree murder depending on the details. (Boeing knew or should have known that their mistakes could lead to death and so mitigated this)

Note that US states are not consistent on what is second degree murder. I cannot find a federal definition (I'm not a lawyer - this should be seen as me not knowing the right search terms). There are many other countries with their own definitions of murder which are all slightly different.