ASHLAND, Ohio (AP) -- Authorities in Ohio say a man suspected of killing his on-and-off girlfriend during a vacation to North Carolina's Outer Banks is in custody after a monthlong nationwide manhunt.

The U.S. Marshals Service said Wednesday that Nathan Summerfield was under arrest. They didn't immediately say where Summerfield was apprehended.

Summerfield was wanted on a murder charge in the death of 33-year-old Lynn Jackenheimer of Ashland, Ohio. She disappeared in July while vacationing with Summerfield and her children. Her body was found in a vacant lot in Frisco, N.C., about 20 to 30 miles from where she'd been vacationing.

Police say Summerfield returned the woman's children to Ashland and drove away.

The suspect's brother has told authorities that Summerfield said he strangled Jackenheimer.

Investigators say she died from strangulation and stab wounds.