A new study says hundreds of federal immigration raids in New York and New Jersey have been unconstitutional. The Nassau County-backed report says armed immigration agents broke the law when they forcibly entered homes in pre-dawn raids. The raids were intended to nab dangerous criminals, but instead resulted in the detention of Latinos accused of civil immigration violations but no criminal activity. Acting without warrants, the agents carried out searches despite failing to obtain legally required consent in 86 percent of the cases. Nassau police commissioner Lawrence Mulvey said the findings should trigger a federal investigation.