The coronavirus infection spreading across the United States prison system is throwing Ross Ulbricht’s confinement into sharp relief. Found guilty of seven charges including money laundering, conspiracy to traffic narcotics and computer hacking, the controversial founder of the Silk Road is currently serving a double life sentence plus 40 years, without the possibility of parole. As the pandemic worsens conditions for the nation’s large prison population, Ross spends 22 hours a day behind bars in Tucson, Ariz., where he’s currently being held. Outside visits are stopped so Ross’s mother, Lyn, and other loved ones, who work tirelessly for his release,...