This is absolutely true, we are trained to be information sponges and that can also be used against each and every one of us if we are involved in a justifiable on-duty shooting. Even LE shouldn't talk right away or put pen to paper right after an incident. The department union rep and department lawyer should be the first people that are spoken to after an incident.
An example of a inaccurate recollection can be seen and obtained easily after an incident due to the amount of adrenaline that is released and people also reacting differently in moments of high stress.
..."3 shots were fired" when 6 were actually discharged...anything can be potentially used against you.
However, people shouldn't be afraid to talk to LE in certain instances, let's not take the topic to an extreme nature.