I mean as I say, intent to kill is very difficult to establish without circumstantial evidence/motive.

You can shoot at someone and not have intent to kill yes.

The fact that death is a reasonable possibility does not automatically establish intent to kill. If the accused then argues “I was trying to fire warning shots in their direction, it was unlucky that they got fatally hit” then the state must prove that that was definitively not the case.

In all honesty, it doesn’t sound to me (and I doubt it would to a judge) like this lady thought “If this employee wants to stop me then I will just kill her with my car” which is the mindset the state would need to prove she had in order to prosecute this as a murder successfully. Otherwise this falls under manslaughter (and apparently second degree murder in the states but I live in the UK).