(CBS) PHOENIX - One victim has already died in the Phoenix office shooting Wednesday and a second man, Mark Hummels, is not expected to survive, according to Hummels' employer, CBS affiliate KPHO reports.
In a statement on Thursday, the law firm Osborn Maledon said," We have been informed that Mark will not survive from the shooting."
Police said Arthur Douglas Harmon, 70, killed Steve Singer, and also wounded Hummels and a 32-year-old woman at a Phoenix office building late Wednesday morning.
Harmon was found dead in a Mesa, Ariz. parking lot on Thursday morning. Police believe he died of a self-inflicted gunshot wound.
Police say the office shooting was not a random attack. According to court documents, Harmon was in a legal dispute with Scottsdale-based Fusion Contact Centers LLC, where Singer was the CEO. Hummels was representing Fusion in the lawsuit.