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Police: Suspect facing murder charge after victim dies following West Valley shooting

The 35-year-old victim was shot on Sept. 19 and later died.
Credit: 12News
Surprise Police Department

SURPRISE, Ariz. — A 23-year-old suspect is facing a murder charge after a man he allegedly shot last month in Surprise succumbed to his injuries.

The Surprise Police Department said Roger Diaz was taken into custody on Sept. 23 in relation to a shooting reported at a home near Greenway Road and Grand Avenue a few days earlier. 

Isaiah Rivera, 35, was shotand later died from his injuries. Diaz was initially facing charges of aggravated assault and disorderly conduct. 

As a result of Rivera's death, police said Diaz is now facing a charge of first-degree murder.

Police said Diaz and Rivera allegedly knew each other before the shooting. 

Anyone with more information about this incident is asked to contact the Surprise Police Department at 623-222-4000.

RELATED: Suspect shot to death by Tempe police connected to shooting at Tempe Beach Park

RELATED: Man found guilty of murdering ex-girlfriend's teenage daughter in Mesa

UP TO SPEED

What is the Valley?:

“The Valley” is what locals call the Phoenix Metropolitan Area. It is considered the largest metropolitan area in the Southwest. 

The Valley is made up of various major cities other than Phoenix, including:

  • Mesa
  • Chandler
  • Scottsdale
  • Tempe
  • Glendale
  • Surprise
  • Peoria
  • Gilbert
  • El Mirage
  • Avondale
  • Litchfield Park
  • Goodyear
  • Buckeye

Whether a city is in the “East Valley” or “West Valley” depends on where it is in relation to Phoenix.

The cities of the Valley have a combined population of 4,845,832 people, according to the 2020 United States Census. This makes it the 11th largest metropolitan area in the country right behind the Boston and Atlanta areas.

How big is Maricopa County?

Maricopa County is the United States’ 4th largest county in terms of population with 4,485,414 people, according to the 2020 Census.

The county contains around 63% of Arizona’s population and is 9,224 square miles. That makes the county larger than seven U.S. states (Rhode Island, Delaware, Connecticut, Hawaii, New Jersey, Massachusetts and New Hampshire).

One of the largest park systems in the nation is also located in Maricopa County. The county has an estimated 120,000 acres of open space parks that includes hundreds of miles of trails, nature centers and campgrounds.

The county’s seat is located in Phoenix, which is also the state capital and the census-designated 5th most populous city in the United States.

The county was named after the Maricopa, or Piipaash, Native American Tribe.

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