The parents of a 26-year-old man killed by an avalanche during an Alaska Heliskiing tour in March want the Haines Borough to discontinue the company’s permit, saying details of the fatal accident showed the firm did not follow its own, borough-approved operation and safety plan.

“We believe permit requirements and compliance to policies, procedures and protocols in the operations plan have been broken, resulting in the death of Nickolay Dodov. We have documentation of negligence,…