Edited sentence: 60 percent of the 20,000-strong 18th Street Gang in southern California were illegal aliens in a 1995 report.According to un-cited sources in her article, in Los Angeles, 95 percent of all outstanding warrants for homicide are for illegal aliens.Heather MacDonald at the Manhattan Institute in a 2004 article argued that sanctuary policies has caused large problems with crime by illegal aliens since the police cannot report them for deportation before a felony or a series of misdemeanors takes place.Up to two-thirds of all fugitive felony warrants (17,000) are for illegal aliens