The video, obtained by WABC-TV, was filmed by a witness late last month but not revealed until now. Police have already seen it, WABC-TV reports.
"What the f**k is wrong with you?" shouts one of the bikers, as Lien is pulled from his Range Rover, which contain his wife and 2-year-old daughter.
The video appears to show the bikers beating Lien with their helmets and stomping on him. At one point Lien is shown lying on the ground, not moving.
WARNING: Video is violent and may be unsuitable for some viewers.
How to vote
Vote-by-mail ballot request deadline: Varies by state
For the Nov 3 election: States are making it easier for citizens to vote absentee by mail this year due to the coronavirus. Each state has its own rules for mail-in absentee voting. Visit your state election office website to find out if you can vote by mail.Get more information
In-person early voting dates: Varies by state
Sometimes circumstances make it hard or impossible for you to vote on Election Day. But your state may let you vote during a designated early voting period. You don't need an excuse to vote early. Visit your state election office website to find out whether they offer early voting.My Election Office
General Election: Nov 3, 2020
Polling hours on Election Day: Varies by state/localityMy Polling Place