The Los Angeles Times suspended one of its blogs after discovering that the author used an alias to post material at Web sites operated by the Times and others, which is a breach of the Times’ ethical policies. The blog in question is Golden State, which is written by Pulitzer Prize-winning Times columnist Michael Hiltzik. The L.A. Times explained in a “Notice from the Editor” posted April 20 that Hiltzik admitted to using an alias, but wasn’t more specific. “The Times is investigating the postings,” the editor’s note said.