Mississippi Attorney General Jim Hood launched a broad investigation of Google search results in October. On Friday, after reports on Ars and elsewhere showed the investigation involved heavy MPAA involvement, Hood backed off, saying he wants to "call a time out so that cooler heads may prevail." That hasn't put an end to the chief concern: the entertainment industry may try to get by other means what it couldn't get from Congress, when the SOPA and PIPA anti-piracy bills went down in flames. Trade groups that represent the industry's biggest companies along with several public interest groups sent a letter to Hood this afternoon reminding him about how widely unpopular SOPA was. Attached are several other letters from prominent persons and groups who fought against SOPA back in 2011.