Law firm says Phoenix attorney has died from wounds in Wednesday's office shooting

This undated photo provided by the Osborn Maledon law firm shows Mark Hummels, who was critically wounded during a shooting at a Phoenix office building on Wednesday, Jan. 30, 2013. Hummels is an attorney who represented the company involved in a contract dispute with the shooter, Arthur Douglas Harmon. (AP Photo/Osborn Maledon) (The Associated Press)

La imagen sin fechar proporcionada por el Departamento de Policía de Phoenix muestra a Arthur Douglas Harmon, de 70 años, y a quien las autoridades identificaron como el presunto agresor de un tiroteo en Phoenix, Arizona, el miércoles 30 de enero de 2013. Harmon fue fue hallado muerto el jueves por la mañana, poniendo fin a una búsqueda de cerca de 24 horas que mantuvo en alerta a los habitantes de la zona. (Foto AP/Departamento de Policía de Phoenix) (The Associated Press)

A lawyer wounded in this week's Phoenix office shooting has died.

Mark Hummels had been on life support at a Phoenix hospital after Wednesday morning's shooting that killed a Scottsdale-based company's CEO.

His law firm's publicist, Athia Hardt, says Hummels died Thursday night.

Police say the gunman — 70-year-old Arthur Douglas Harmon — was found dead early Thursday in Mesa from an apparent self-inflicted gunshot wound.

They say Harmon opened fire at the end of a mediation session over a lawsuit he filed last April.

A woman also was shot, but her injuries were not life-threatening.

The 43-year-old Hummels worked with the Phoenix law firm Osborn Maledon and focused on business disputes, real estate litigation and malpractice defense.