SCOTT, Ark. (AP) — Police discovered the body of a missing Arkansas real estate agent in a shallow grave at a concrete company early Tuesday, and a man arrested in connection with her kidnapping is expected to be charged in the death, authorities said.

Investigators found the body of real estate agent Beverly Carter, 49, Tuesday at Argos Concrete Company in a rural area about 25 miles northeast of Little Rock. Carter's body was found more than 20 miles away from Scott, where she had an appointment to show a house Thursday but hadn't been seen since.

Police arrested 33-year-old Arron Michael Lewis on Monday on suspicion of kidnapping Carter. Pulaski County Sheriff Doc Holladay said Tuesday those charges will be upgraded to capital murder, but Lewis had not been charged yet Tuesday morning.

Lewis, who was on parole for previous convictions in northwest Arkansas, was being held in the Pulaski County jail on $1 million bond. Jail records don't list an attorney.

Police haven't said how investigators linked Lewis to Carter's disappearance, but the sheriff said more details will be released at a Tuesday afternoon news conference.

"I just want to express my condolences to the Carter family and her friends who have worked so hard to find her and these investigators who were committed to finding her," Holladay told reporters Tuesday morning.