Towner writes on the Instagram post, "Here is some of the footage of the recent white shark hunt by Orca. One of the most incredible pieces of natural history ever captured on film. We are looking forward to sharing the science behind this and the rest of the interaction soon, and trust me there is more!"
The footage was shared as part of the Discover networks Shark Week event and has since been viewed thousands of times on social media.
Speaking to Daily Beast, Towner who lives in South Africa, added: "It's probably one of the most beautiful pieces of natural history ever filmed. I really do think once that footage airs, it's going to go viral."
"We’ve had all the evidence for killer whales being responsible for killing white sharks. But this is the world's first drone footage of killer whales predating on a white shark. It's the first time in South Africa it's ever been documented as direct evidence."