A google search for Willian Lu brought up this page
http://www.whois.sc/spy-sheriff.com
69.50.170.82 spy-sheriff.com
InterCage, Inc. INTERCAGE-NETWORK-GROUP (NET-69-50-160-0-1)
69.50.160.0 - 69.50.191.255
William Lu STANDARDSHELLS (NET-69-50-170-0-1)
69.50.170.0 - 69.50.170.255
searching for spy sherrif brought out this
http://www.adwarereport.com/mt/archives/000253.html