The driver was questioned by BART police and released, angering witnesses who called for the driver's arrest.
The infant was discovered later in the afternoon by the mother, who notified BART police.
Although she is generally wary of tasers due to planned training she supports the 2011 decision to give all BART police officers tasers.
A scuffle between BART police and the demonstrators held up departure for some minutes.
The BART police have various positions in their ranks.
As a result he was shot by BART police.
He was killed by the BART police.
BART police had been on edge before the shooting because two guns had been recovered in separate incidents along the rail line over the previous hour.
These claims have not been confirmed by BART police.
Calls to BART police spiked by over 100%, compared to a 10% increase in the number of passengers on the same day the previous year.