BART's inspector general has put out a new report that says these employees were getting paid their regular salary and overtime.
In one instance, a technician for the system's automatic fare collection system clocked in and didn't work the shift, for a total of 106 hours over 18 days last year.
That earned him more than $9,000 in falsely billed wages and benefits while not actually working.
He retired after investigators got BART police involved and is now facing criminal charges.
BART management is handling the other two.