I've watched some good presentations and heard some good talks on this and how to handle it, but it's been years and the info wasn't very memorable.
I'd recommend looking at corporate training. All of the institutional places i've worked have had powerpoints or training regarding how to handle that type of situation.
Also remember courtesy goes a long way. You don't want to make the co-workers feel at fault, attacked, or that they were negligent. Try phrasing things in ways that show youre just looking to build a more positive patient care environment. Bring the conversation towards ways that your team can help patients, ways that you can help protect your licenses and confidentiality. One great way I was taught to bring up problems with patient care is to use an example with a family member (such as "how would you feel if that patient was your grandmother" etc,). It reminds people that everyone really does deserve their own dignity and respect, which can be forgotten as people get jaded.