The chemical can cause severe mercury poisoning, something that can result in slurred speech, physical impairment, vomiting, blindness, loss of hearing, coma and even death.
Vendors are selling phony documents meant to fool authorities into thinking consumers have been vaccinated when, in fact, they have not been.
Investigators said the "Joker's Stash" marketplace, which dealt in stolen credit cards, log-ins and identity information which it sold for cryptocurrency, pocketed at least $1 billion, Reuters reported from London.
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The 26-year-old woman allegedly agreed to pay $20,000 for the killings and had already made a payment of $6,000 towards the crime.
Keith Edward Greene Jr. is accused of kidnapping, interference with custody, and luring or enticing a child after the child disappeared from her home in Apopka.
Jamie Lynn Ridd had pleaded guilty in June to buying insulin, E. coli., and other bacteria on the dark web that she allegedly used to inject into her roommate, potentially causing staph infections.
John Michael Musbach allegedly asked if 14 years old was an "acceptable age or too young" when hiring a hitman on the dark web.
In the biggest card dump in history, dark web site Joker's Stash has listed 1.3 million Indian credit and debit cards for sale, in an online shop that is valued at $130 million.
Gary Van Ryswyk, of Sebring, was detained by officers from the Highlands County Sheriff's Office on Monday and charged with practicing medicine without a license resulting in bodily injury.
Dark web markets are now "being picked off one by one," according to a top cybersecurity expert.
The man was allegedly caught posting an advert seeking a girl to facilitate his necrophilia and cannibal fantasies.
On the dark web, Paul Christian Stellato was known under the pseudonym "cocaineking247."
The boy's mother was given a 12-and-a-half year sentence for the abuse.
"If successful, a decentralized prediction market would be a benefit for society," one expert told Newsweek.
Using crypto-currency and an underground network of nearly-untraceable websites, people get what they need.
The blockchain is a distributed public ledger of cryptocurrency transactions.
A database of 1.4 billion user passwords compiled from 252 data breaches is suspected to be the largest ever.
Criminals are migrating to the dark web on a massive scale, Europol warns.
It is not clear why websites including the popular Dream Market suddenly disappeared.
Manhattan federal prosecutors have seized $48 million from Robert Ulbricht, Silk Road creator.
"He got his son, Philip Luciano, involved," states a federal court complaint. "Philip was the one who knew how to use the dark web: Philip set up their account on the dark web and handled the transactions."
The records come from at least nine states, and the seller claims to have more.