The FBI can take detailed pics of the persons face right when they are arrested and immediately send the data to a 3D printer.
If they have all of the processes in place before hand, they can definitely beat the clock before a passcode is required.
Only one problem with that. With touch id.. they had to guess which finger the person set up, and they only had a few tries. Same problem with Face ID. someone could have set it up with their arse instead of their face.