“Tommy said that he was on his way back to the apartment.. he wasn't in it when it caught on fire.. but he said the day before his air conditioning was making a lot of noise and that to me means mechanical friction.. and he was going to buy a new one that day so I always suspected it was an air-conditioner fire,” Schmidt said. “I think the undetermined cause is a correct analysis .. They weren't able to find it maybe they looked at the air conditioner and they could not determine it,”