If the Landlord has a Drug and Crime Free Housing Addendum in her lease contract, they have the right to immediately terminate her lease.
I'm not saying they don't have grounds for terminating her lease, but evicting a tenant due to termination of a lease takes time and isnt instantaneous. As I mentioned, here in IL a landlord has to serve a tenant with a 30 day notice if they're terminating the lease (5 days if the termination is for non-payment of rent), but that doesn't mean they can force them out at the end of 30 days. If the tenant doesn't vacate the premises, the landlord has to file with the courts, which takes another 30 days on average. Once the court decides in the landlord's favor, if the tenant STILL hasn't vacated the premises, the landlord has to pay the sheriff to remove the tenants property from the premises which can take another 30-60 days. In the meantime, most of these tenants remain in the property - rent free - until they have no other choice. Landlords can loose thousands of dollars trying to evict a tenant.
The article made it sound like the building kicked her out and had a truck remove her things from the apartment leaving her homeless. I don't know what NY laws are like regarding landlord/tenant disputes, but it sounds more like Amanda left on her own accord - maybe after the building kicked her out. I hardly doubt she would leave without having somewhere else to go.