Those familiar with how investigators do their work have stated these tactics used can and do obtain information that they can weave into any scenario they want......Additionally you have a very young gal believing the police are trying to solve a murder....not implicate you....it was a messy job from the beginning.
And don’t forget she didn’t speak Italian four years ago. Imagine a rapid fire interrogating in Italian with a stumbling translator getting the questions and your replies out of sequence. With the interrogator asking you to speculate on what could have happened and then calling it a “confession”. This is right out of a bad movie script for a Pink Panther farce.
Never voluntarily talk to police if there is the remotest chance they might view you as a suspect. Always ask for a lawyer to be present at any questioning.