MESA, Arizona — A 35-year-veteran of the Mesa Fire Department died Tuesday morning while on duty. Firefighter Mark Keller, ...

Watch the full procession for Mesa Firefighter Paramedic Mark Keller, who died while on duty last week. The procession will ...

The funeral and procession for Mesa firefighter paramedic Mark Keller was held in the East Valley on Thursday morning.

The Mesa Fire Department is mourning the loss of Firefighter Mark Keller. Officials say Keller died Tuesday morning while on ...

PHOENIX — The Mesa Fire and Medical Department is in mourning after the death of longtime firefighter Mark Keller. Keller was found dead while on duty Tuesday morning, the department said.

Mesa firefighter Mark Keller was "found passed away while on duty" according to Mesa Fire and Medical Department officials. Keller was a 35-year veteran of Mesa Fire and Medical. MESA, Ariz.

Saturday’s 100 was the glaring question mark. Keller considered the sprint his worst event. But his time of 10.47, the second-best in league history, erased all doubts. “That’s my best 100 ...

The Mesa Fire Department is mourning the loss of Firefighter Mark Keller. Officials say Keller died Tuesday morning while on duty. “My heart is with the Keller family in this difficult time.

Justice Sonia Sotomayor interrupted U.S. Solicitor General John Sauer during argument over birthright citizenship and nationwide court injunctions on Thursday, prompting Chief Justice Roberts to ...