Need Advice PLEASE!

I need advice. I recently started working as a nanny, but before this, I worked at a church daycare. While I was there, I got in a lot of trouble for things like sending a child home for a 101.5 degree temp without asking the (absent) director, and for using a rectal thermometer on a 13 month old. (I get the issue there, but it was also the only thermometer in the daycare that works, and it's the one I was given by older ladies who worked there). Meanwhile, my coworker was incredibly lazy. My children (18-36 months) were not changed until I came in at 9:30, she wouldn't put the potty training children on the potty to at least try to go, and she sat on her phone all day. I was changing a child one day and I heard two children fighting and screaming. She was sitting on her phone, texting, and when I asked her to take care of it, she didn't even look up and told them to stop. It ended with one child being bit so hard that he had a bruise for two weeks.

These are just a couple of examples of things that went on. I recently found out that my former boss hasn't hired anyone else to take my place, and two other women have recently quit. She's had 5 weeks to hire new workers and she refuses to. The daycare already had an illegal teacher/child ratio, and the director would leave promptly at 4, not checking on the workers.

Should I let the parents know what happened? I had two parents ask if they should be concerned when I let them know I no longer worked at the daycare, so I told them about why I left. But should I let the others know? I'm worried about legal repercussions and such. Thank you!