A police sketch of Shelwyn Patt who was arrested Saturday for stabbing a bus driver with a syringe last month.
A quick thinking bus driver helped police arrest the man behind a previous syringe attack on another bus driver.
Shelwyn Patt is now behind bars, accused of plunging a syringe into bus driver Marc Salandy's shoulder on a B68 bus last month.
Patt was arrested Saturday, when a bus driver recognized him from a police sketch and quickly alerted authorities.
The 53-year-old is has been charged with felony assault.