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The Latest: 21-year-old man arrested in Phoenix-area freeway shootings to appear in court

  • Leslie Allen Merritt Jr., makes his way to appear before a judge at the Maricopa County Sheriff's Office on Saturday, Sept. 19, 2015, in Phoenix. The landscaper is the suspect in a series of Phoenix freeway shootings and was arrested Friday after trying to sell a gun at a pawn shop.  (Rob Schumacher/The Arizona Republic via AP, Pool)

    Leslie Allen Merritt Jr., makes his way to appear before a judge at the Maricopa County Sheriff's Office on Saturday, Sept. 19, 2015, in Phoenix. The landscaper is the suspect in a series of Phoenix freeway shootings and was arrested Friday after trying to sell a gun at a pawn shop. (Rob Schumacher/The Arizona Republic via AP, Pool)  (The Associated Press)

  • Leslie Allen Merritt Jr., waits to make his initial appearance before a judge at the Maricopa County Sheriff's Office on Saturday, Sept. 19, 2015, in Phoenix. The landscaper is the suspect in a series of Phoenix freeway shootings and was arrested Friday after trying to sell a gun at a pawn shop.  (Rob Schumacher/The Arizona Republic via AP, Pool)

    Leslie Allen Merritt Jr., waits to make his initial appearance before a judge at the Maricopa County Sheriff's Office on Saturday, Sept. 19, 2015, in Phoenix. The landscaper is the suspect in a series of Phoenix freeway shootings and was arrested Friday after trying to sell a gun at a pawn shop. (Rob Schumacher/The Arizona Republic via AP, Pool)  (The Associated Press)

The latest on the investigation and arrest in a series of freeway shootings in the Phoenix area (all times local):

9:30 a.m.

A 21-year-old landscaper is expected to be charged in connection with four shootings along Phoenix-area freeways that have kept drivers on edge for weeks.

Maricopa County Superior Court officials say Leslie Allen Merritt Jr. is scheduled to make an initial court appearance Saturday, a day after his arrest related to shootings on Aug. 29 and Aug. 31.

A spokesman for Gov. Doug Ducey says Merritt was taken into custody around 7 p.m. Friday at a Wal-Mart in Glendale, a suburb west of Phoenix.

Arizona Department of Public Safety director Col. Frank Milstead says Merritt is in custody because the weapon he owns is forensically linked to the crimes.