Kobe Bryant’s pilot was employed by a company that is legally not allowed to have its pilots fly in bad weather conditions, according to multiple sources.

Ara Zobayan, 50, was licensed to fly in low visibility, but the charter company he worked for was not certified, sources told the New York Times on Thursday. The revelation calls into question whether Zobayan was flying legally when the helicopter went down Sunday, killing him and eight other people, including Bryant and his 13-year-old daughter Gianna.