A former head of security for a Guatemalan nickel mine once owned by Toronto-based HudBay Minerals Inc. has been arrested in the 2009 killing of a Mayan anti-mine activist, according to a Toronto lawyer acting for the dead man's family. HudBay, which sold off the Fenix mine near El Estor, Guatemala, last year, has denied allegations the mine's security staff were involved in the death, which came amid violent clashes with indigenous protesters. The company declined to comment Friday on the report of the arrest. Toronto lawyer Murray Klippenstein, who has launched three lawsuits in Ontario against HudBay alleging human-rights violations, said Guatemalan authorities had arrested the former head of security for the mine on Sept. 25.