The government didn't read him his Miranda rights because they have enough to convict him at trial already.

There were exigent circumstances to find out immediately if he had any other accomplices. Interestingly, the Canadians made arrests today of "alleged" terrorists;


No connection from the reported arrests but this is a continuing thing. How many Canadians would have been on that train? "the alleged plot targeted a rail line between Toronto and New York City"