randomly surveyed hundreds of people who joined in the march and found 70% were women and quoting all the about 10% of the participants were under 18. the average age of the adults of the crowd was just under 49 years old. she also says 27% of the participants had never protested before and most of the new protesters were not motivated by gun-control but rather, by issues of peace. and of president trump. shannon. >> shannon: all right, trace. very interesting. thank you. tonight, the aclu is urging greyhounds not to let i.c.e. agents searches buses for illegal immigrants without a warrant. meanwhile, the acl use efforts against law enforcement and may have had unintended consequences. researchers are blaming tougher rules on police officers for chicago's huge spike in homicides. they are calling it the aclu effect. the aclu calling it junk science. senior correspondent mike tobin takes a look at the evidence from chicago tonight.