An attorney for Arizona State University hockey player Matthew Mayich says head coach Greg Powers replaced his phone after a training session in which Mayich collapsed, raising questions about whether potential evidence was preserved. Leonard Aragon, who represents Mayich’s family, said Friday that the phone could contain videos or communications among coaches that might help explain what happened during the Aug. 20 workout. The family believes Powers replaced the device after receiving death threats, Aragon said. The family does not condone the threats, he added, but argues that changing a phone number would not require replacing a phone. “It’s a big problem if he replaced his phone and ASU didn’t secure it,” Aragon said. In a letter dated Oct. 3, Aragon asked ASU to preserve evidence. He said he had sent a preservation request shortly after the incident, but the university asked him not to contact employees directly. Aragon said he agreed on the understanding that ASU would meet its evidence-preservation obligations, while expressing concern that it may not have. Powers was placed on paid administrative leave Sept. 30. ASU has appointed former Arizona Supreme Court Chief Justice Scott Bales to conduct an independent review. Aragon called the decision to hire Bales a good one but criticized the investigation’s mandate, saying it focuses on university policies rather than asking what led to Mayich’s collapse. Mayich transferred to ASU over the summer and, according to Aragon, had not been properly acclimatized to Arizona’s conditions before the workout. The attorney said Mayich remains in “terrible, critical condition” and that his family is praying for a recovery. The circumstances of the workout and the handling of any potentially relevant records remain central questions for Mayich’s family as the university investigation proceeds.