Amy Kellogg has the story.
On Monday, Bellingcat reported that the real name of "Petrov" is Dr. Alexander Yevgenyevich Mishkin, "a trained military doctor in the employ of the GRU".
"During his medical studies, Mishkin was recruited by the GRU, and by 2010 had relocated to Moscow, where he received his undercover identity - including a second national ID and travel passport - under the alias Aleksandr Petrov", the report said. British officials said when they brought charges in the March nerve agent attack on Sergei Skripal and his daughter that they believed Petrov was an assumed name.
Bellingcat last month identified Mr Boshirov as a colonel in the Russian military intelligence body GRU, whose real name was Anatoliy Chepiga.
The two suspects had traveled from Russian Federation to London by plane and then visited Salisbury by train on two successive days including the day the attack happened.
Using this identity, Alexander Petrov, travelled extensively to several European countries including Ukraine and Moldova.
Skripal and his daughter were found slumped on a public bench in the town Salisbury and a woman later died after her partner found a fake perfume bottle which police believe had been used to smuggle the nerve agent into the UK.
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And everything else went Boston's way all night, so why not this? Boston went on to win, 16-1, to take a 2-1 lead in their ALDS. He left with the bases loaded and nobody out in the fourth and was charged with six runs and seven hits. "It wasn't an issue".
Researchers from investigative collective Bellingcat claim they have identified the second suspect involved in the Skripal poisoning case.
He studied and graduated from a military medical academy in Russia and then trained as a doctor for the Russian armed naval forces.
Last week, authorities in the Netherlands alleged the GRU tried and failed into the world's chemical weapons watchdog, the Organisation for the Prohibition of Chemical Weapons.
The investigative team at Bellingcat said the identification process included multiple open sources, testimony from people familiar with the suspect, as well as copies of personally identifying documents, including a scanned copy of his passport.
They explained that they went to the small town as tourists and had always wanted to see its tower.
This is how British authorities discovered the two Russian agents allegedly behind the novichok attack.
Footage released by London police of the two suspects in the poisoning of Sergei Skripal.