Does it matter? Both candidates promised to deport gang members. You think it’s possible to do what Harris promises to do by giving each one a jury trial?
If adhering to rule of law is inconvenient, the state doesn't get to ignore it. What if I were to anonymously report you as a gang member? Surely then we'd want to remove you from the country expeditiously, in fact so expeditiously that allowing you to make your case in court would harm public safety. Have fun in CECOT!
That's the strength of the evidence that this individual was a gang member. If it can happen to him it can happen to you or to me.