Yes. He looked at everything. I was even like, where was ted bundy at that time . We have to look under every stone, every pebble. Theyre talking about hundreds of names here. Hundreds, thousands. She is driven. Her tenacity is just remarkable. I knew i was going to find him. It was a competition between him and i. Your heart is pounding like, oh, my gosh. This is real. I said, i found him. I know who killed helene. Hello and welcome to dateline. Helene pruszynski lift by a simple philosophy, smile and make the best of everything. The budding journalist did just that as she started a College Internship in radio. Then helene was murdered. The Investigation Led detectives into the darkest corners of the criminal world, before a groundbreaking investigative tool helped bring the killers secret to light. Heres Josh Mankiewicz with a promise to helene. 40 years is a long time. Thats 40 winters here in colorado. And countless snowfalls. It was on a day like this that young woman disappeared.