The errors and bias in these systems add to the ethical concerns. While it is arguably a good thing to substitute torture with brain image interrogation, there is a risk of putting too much trust in these systems, subjecting innocents to days of leading investigation, just because the computer said there is something to be found there.
Israeli airport security (arguably the best in the world) deploys derivatives of these systems, that look at micro-gestures, elevation of heart rates, pupil dilation, and temperature changes, to see if passengers respond with familiarity to terrorist imagery flashed on a screen as they walk by it. If that already works in practice, imagine the same, but being strapped with hundreds of sensors.
See also the 2010 research on image reconstruction from brain activity, and extrapolate that 10 years in the future and applied to military interrogation: https://www.youtube.com/watch?v=nsjDnYxJ0bo
Israeli airport security (arguably the best in the world) deploys derivatives of these systems, that look at micro-gestures, elevation of heart rates, pupil dilation, and temperature changes, to see if passengers respond with familiarity to terrorist imagery flashed on a screen as they walk by it. If that already works in practice, imagine the same, but being strapped with hundreds of sensors.
See also the 2010 research on image reconstruction from brain activity, and extrapolate that 10 years in the future and applied to military interrogation: https://www.youtube.com/watch?v=nsjDnYxJ0bo