Lulzsec Hacker tracked by Proxy logs, can face 15 years prison if convicted. Cody Kretsinger, 23, allegedly used the anonymity service during his role in the attack on Sony Pictures. The logs maintained by HideMyAss.com, in addition to other evidence, has led to the arrest of another LulzSec member in Arizona, The Tech Herald has learned. The service stores logs for 30-days when it comes to Website proxy services, and they store the connecting IP address and time stamps for those using the VPN offerings.
Source: https://thehackernews.com/2011/09/lulzsec-hacker-tracked-by-proxy-logs.html