I am getting difficulty in deducing the meaning of idiom tracked up in the given diction below,
( paragraph below is taken from the NYTimes editorials ) :
...the Boston Global to do more than enumerate the scope of the scandal by reporting on cases involving scores of abusive priests. The scandal was tracked up the church hierarchy to Cardinal Bernard Law, who eventually had to resign his leadership when the news media, not the church, documented his role as a protector of abusive priests...
Kindly help me in understanding the meaning of the sentence in bold letters above and the meaning of "tracked something up" idiom metamorphically.
From this link -> http://idioms.thefreedictionary.com/track+up
All I understood is, It means spoiling something (maybe a surface) by your dirty feets
How can apply this meaning to above paragraph?