You have to get a warrant signed, and some states do allow no-knock warrants, ONeal said. Heavily armed police surrounded the building and helicopters whirled overhead but the demonstrators were allowed to leave around 11pm. Footage from the ground as well as a news chopper shows a black pickup truck plowing into the crowd, striking a woman and throwing her to the pavement. Authorities arrested at least 24 people on charges including unlawful assembly, failure to disperse and riot in the first degree, police said. An LAPD helicopter that was tracking the protest was able to follow the truck as it sped off, directing ground units which pulled over the driver.
the demonstration were not violent.
( z0 violent :domain ( z1 demonstrate ) :polarity - )
(z0 / violent
    :domain (z1 / demonstrate-01)
    :polarity -)
the demonstration were not violent .
z0 :polarity 0
z0 :domain z1