Method for detaining repeat undocumented felons

Due to the extremely large amount of undocumented ex-felons loose among many major metropolitan cities, an easy, yet humane way of detaining certain people more urgently than others is urgent to lower violent crimes. An executive order that would deem all illegal alien criminals enemies of the state would be the first step. Since when an individual is booked by metro police or sheriff is then fingerprinted and logged, the local governments already know these persons by name and birth dates. Many “sanctuary cities” have circumvented federal laws refusing to report crimes or turn over individuals when needed, as well as local judges pleading down constantly serious offenses nationwide. Now after the original order, the next step would be to put a federal mandate on local and state police departments NATIONWIDE to automatically report and detain persons arrested for any felony offenses no matter the severity, as soon as the local jurisdiction deems such person classifiable as a “suspected foreign national.” Next, that ruling would need to supersede any judge’s/ local DA’s attempts on granting bail/ or bond on such persons. Also most importantly, there would need to be a clause in the mandate, stating that any foreign nationals caught in the process of committing a felony across any US state automatically becomes a federal charge regardless of crime and/or offense at that moment. By this point, such persons would be detained federally, without possibility of bail, to face charges of the original offense AND violation of federal immigration laws as well. This method might require the swift construction of new detention centers near major metropolitan areas to handle the influx of persons as well as additional public defenders to serve detainees quickly avoiding a long backlog of cases. This policy would in turn, rapidly increase the quality of life in major urban centers nationwide.