Besides for breaking the record for a manned sub dive in the Mariana Trench, the latest dive down to the deepest point underwater found a heartrending discovery: The existence of the plastic waste on the bottom of the ocean.
He also saw angular metal or plastic objects - one with writing on it.
An American diver set a new record for the deepest dive in history last month when he plunged almost 36,000 feet.
However, Vescovo says that they are still investigating.
In the recent dive, Walsh accompanied a team up above on the ship, as Vescovo descended alone in a submersible called the DSV Limiting Factor.
A key mission objective was to capture video evidence of what was at the bottom of the Challenger Deep, which was first explored in 1960.
Vescovo hoped his discovery of trash in the Mariana Trench would raise awareness about dumping in the oceans and pressure governments to better enforce existing regulations, or put new ones in place.
"It is nearly indescribable how excited all of us are about achieving what we just did", he said in a release after the completion of the dives.
Remembering Grumpy Cat's prolific advertising career-from Friskies to Grumppuccino
It allowed her to quit her job as a waitress at Red Lobster within days of her cat's internet debut, USA media reported. According to his owners, the cat from Arizona, whose real name was Tardar Sauce , "helped millions of people smile".
Those candy wrappers you threw out? Two of the dives, including the deepest one made on 28 April, were solo dives piloted by Vescovo.
The previous record was held by "Titanic" director James Cameron in 2012.
"It was very disappointing to see obvious human contamination of the deepest point in the ocean", Vescovo was quoted as saying by news agency Reuters.
Technology has changed quite a bit since the Challenger Deep was first explored in 1960 by oceanographers Don Walsh and Jacques Piccard in the submersible Triest.
It was the voyage to break the record for the world's deepest ocean dive. Scientist now plan to test the creatures they found for the presence of micro-plastics in their anatomies.
"Our team had to pioneer new camera systems that could be mounted on the submersible, operate at up to 10,000m below sea level and work with robotic landers with camera systems that would allow us to film Victor's submersible on the bottom of the ocean".
In the May/June issue of Hydro International we'll publish an article about the Five Deeps Expedition.
But Vescovo and his team are not stopping now, with another dive of the Horizon Deep within the Tonga Trench in the South Pacific Ocean coming up next.