BOISE, Idaho (AP) — Idaho State Police arrested a 58-year-old man, saying he brutally murdered an associate to hide theft of $30,000. Troopers arrested Douglas Everett Anderson in Salmon on Friday.

They plan to charge him with grand theft and first-degree murder following the slaying of Darole Carpenter of Emmett on July 8. Carpenter, who was 78, was found bludgeoned and stabbed at his home in Emmett, in southwestern Idaho. Investigators say Anderson killed Carpenter to hide that he'd stolen approximately $30,000 that he'd been supposed to use to buy cattle and hay.

He'd never intended to make the purchases, authorities say. Police also aim to charge Carpenter with forgery and two additional grand theft counts, related to a separate transaction in which he also promised to buy livestock and feed from another couple.