CCTV footage showed how the Spanish train that derailed on Wednesday evening crashed into a wall at high speed.
The Spanish train that derailed entered a sharp bend at high speed then careered off the tracks, smashing into a wall running alongside the rail.
At least 80 people died and 130 were injured in Spain's worst train disaster in 40 years.
One driver of the train has been put under formal investigation, a spokeswoman for Galicia's Supreme Court told Reuters.
CCTV video shows Spain train crash (0:14)
July 25 - CCTV footage reveals exact moment a Spanish train derailed, killing at least 80 people and injuring over 130 others. Rough Cut (no reporter narration). ( Transcript )