The family of a flight nurse killed with two other people when a medical helicopter crashed last summer near Indianapolis. The helicopter’s main rotor blade either contacted unmarked power lines or “spontaneously separated without contact,” causing the deadly crash.

Attorneys hired by National Bank of Indianapolis filed the lawsuit in Marion Superior Court last week on behalf of Pearson’s two children, Gabrielle, 8, and Garrett, 10.

“These helicopter crashes have real human life consequences,” said Gary Robb, a Kansas City, Mo., attorney representing the plaintiffs. “I’m going to make sure these children do not have any kind of financial hardship over the death of their mother.”