Back in 2013 I reported that the New Jersey State Appeals Court had ruled that texting someone while that person is driving may cause the sender to be liable if an accident occurs. See here, here and here. To my knowledge, that was the only case that had been decided that way. Until now.
Eric Turkewitz of the NY Personal Injury Law Blog is reporting that a lower court in Pennsylvania has reached a similar result in a case called Gallatin-v-Gargiulo. You can read Eric's comment here.