Hypothetical question time. Who is responsible in this case?

Bob is a genetic engineer. He's been working on a side project for several years: a new species with the intelligence of a human. Finally, Bob makes a breakthrough. He has created a creature superior to humans in every way. Bob excitedly begins the process of incubating a full-grown specimen. All of Bob's... show more Bob is a genetic engineer. He's been working on a side project for several years: a new species with the intelligence of a human. Finally, Bob makes a breakthrough. He has created a creature superior to humans in every way. Bob excitedly begins the process of incubating a full-grown specimen. All of Bob's testing indicates that the creature is perfect.

As Bob has chosen to accelerate the growth rate, it is full-grown within a few weeks. Everything is still indicating that the creature is perfect.

Then one day, one of Bob's colleagues decides to mess with his specimen. She teases the creature and makes it angry, and it lashes out and kills her.

Who is at fault here?
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