your definition is incorrect.

dictionary.reference.com/search

there's a link to www.dictionary.com & their definition of corruption. part of the definition requires that the subject has committed the act for some sort of personal gain. what did they stand to gain by beating an unarmed, senior citizen?

i reiterate to the ignorant, narrow minded folks who like to insult(or attempt to insult) instead of mature discussion, this is a case of excessive force not corruption.

here's a link for excessive:
dictionary.reference.com/search

here's a link fo force. scroll down to the bottom to read definitions as it pertains to law.
dictionary.reference.com/search