Volodymyr Zhukovskyy, 23, was arrested near his home in West Springfield, Massachusetts, three days after the carnage on a fugitive-from-justice charge. He was initially charged with seven counts of negligent homicide.
Now more charges have been added: seven counts of manslaughter, seven counts of negligent homicide-DUI, seven counts of negligent homicide, one count of aggravated driving while intoxicated and one count of reckless conduct.
It will be alleged that Zhukovskyy crossed the centre yellow line and crashed into a group of oncoming riders from the JarHeads Marine veterans group.
The riders were on their way to a charity event in New Hampshire.