Deputy Breaking News Editor

Ryan Fonseca

The train had to be evacuated, and the SFMTA has launched an investigation.

The action claims safety mechanisms would have prevented the 19-year-old's death.  

The moment frantic commuters noticed someone had boarded with a carcass was caught on tape.

Investigators were working to find out why a person was on the Caltrain tracks in San Carlos when 

After the deaths of two teenagers who rode on top of moving BART trains, their mothers are urging the agency to take action.