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Input: SAN FRANCISCO â Sayfullo Saipov  the 29-year-old suspect in Tuesday's deadly New York truck attack  earned money the way many gig economy works do. He drove for Uber.
But the fact that  Saipov  raised no flags for the ride-hailing company when it conducted its standard background check shows just how difficult it is to screen for potentially criminal behavior if there is no track record.
 Saipov  drove more than 1 400 trips for Uber in the past six months. Authorities continue to investigate the suspect  who came from Uzbekistan in 2010 and settled in Paterson  N.J. To date  his biggest offense seems to be from 2015  when he was cited by police for towing a trailer that was too long.
This undated photo provided by St. Charles County Department of Corrections via KMOV shows the Sayfullo Saipov. A man in a rented pickup truck mowed down pedestrians and cyclists along a busy bike path near the World Trade Center memorial on Tuesday  Oct. 31  2017  killing several. (Photo: St. Charles County Department of Corrections/KMOV via AP)
The company's response to that incident was the same as its statement after  Saipov  rammed  his  rented truck into bicyclists  killing 8. An Uber representative said the company was "horrified" at the senseless act of violence as was cooperating with federal officials.
Uber said  Saipov  had been banned from the Uber app.
More: NYC terror attack:  Sayfullo Saipov  was here on diversity visa  Trump says. What is that?

Sayfullo Saipov NYC terror suspect drove for Uber