Why is there not a national telephone number you can call to report illegal immigrants?

Question

It seems that there should be a national number and that local authorities should have to report back to the federal authorities on whether the law is being carried out in each case.

Answer 1

http://www.ice.gov/

Report Suspicious Activity:
1-866-DHS-2-ICE
1-866-347-2423

Answer 2

i know, you should be able to call someone then they'll take care of the problem by sending a bounty hunter after them