Contractors lavished an Amtrak manager with $150,000 in cash bribes, luxury cars, vacations, and a pure-bred German shepherd puppy. In exchange, he approved millions of dollars in extra work.

In January 2017, two executives at a construction firm working on the restoration of 30th Street Station’s limestone facade took an Amtrak employee out to dinner. They came bearing a gift.

An anonymous tip led to a yearslong investigation and federal charges tied to a bribery scandal at 30th Street Station. Plus, ...

Employee #1 has been widely identified in news reports as Ajith Bhaskaran, a program manager for Amtrak’s major capital construction ... redevelopment of 30th Street Station—which is ...