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Maryland police are using drones from a Chinese company that were banned in four states
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
I don't think this is an economic decision. Chinese companies have been caught putting malware and spyware into their hardware. Not all of them of course, but a couple. Lenovo did it, and they're probably the most well known.
For consumer goods, that's probably fine. No one cares if China spies on grandma. But for law enforcement, we really don't want to be using spy bots.