CNN  — 

Survivors of Larry Nassar’s abuse say USA Gymnastics coach Martha Karolyi knew in 2015 that the team doctor had been accused of molesting young girls at the training center that bears the Karolyi name.

But she never reported the allegations to Texas authorities and should face charges, the women’s lawyers say.

Gymnasts who say they were molested by Nassar at the famed Karolyi Ranch are expected to speak in a news conference on Thursday to demand criminal sanctions for Martha Karolyi and her husband, Bela Karolyi. Other survivors who were abused by Nassar at Michigan State University are also expected to speak.