If he had killed or harmed any of his passengers, or attacked others while driving Uber passengers, then the answer would clearly be yes.

But that never happened, so your analogy here is totally bogus and off-base.   Yes, he took Uber passengers in between his killings.   But he did not attack anyone while doing business on the behalf of Uber.

In this case, this woman was in the process of delivering pizzas, when she crashed and ran into this Vet.   She was on the job.

Another major difference:  Uber drivers are independent contractors.   They are not actual employees.   In the case of this woman delivering Pizzas, she was an employee of the Pizza Shop.