ANACORTES, Wash. — Mark Stover was the Pacific Northwest’s dog-trainer-to-the-stars. He taught obedience to the pets of Pearl Jam and Nirvana, Starbucks chairman Howard Schultz and Seattle Mariners outfielder Ichiro Suzuki. He also trained his own dog, Dingo — for protection. But when Stover’s presumed killer came last month, there was nothing Dingo could do. She was shot in the face, and when deputies arrived, the only signs of her master were smears of blood in a downstairs bedroom and hallway.

Investigators have yet to find Stover’s body, but prosecutors have charged his ex-wife’s boyfriend with murder in a case that may have stemmed from their divorce two years ago.

Stover, 57, and ex-wife Linda Opdycke, 45, opened Island Dog Adventures in the early 1990s on an island her wealthy family owned 55 miles north of Seattle. Opdycke’s father was one of the founders of Washington’s biggest winery, Chateau Ste. Michelle.

Clients included Pearl Jam’s Eddie Vedder; former Nirvana bassist Krist Novoselic; Soundgarden’s Chris Cornell; moviemaker Cameron Crowe and his wife, singer Nancy Wilson of the ’70s group Heart; and Costco Corp. CEO Jim Sinegal. Suzuki brought his Shiba Inu there.

In early 2008, Opdycke took out a restraining order against Stover, accusing him of harassment. Opdycke didn’t return a message seeking comment.

On Oct. 28, a neighbor of Stover’s reported a trespassing at a grange hall a half-mile from Stover’s house. Two cars were parked out back — one was Stover’s, and the other belonged to Opdycke’s boyfriend, Michiel Oakes, authorities said.

The next morning, Stover’s fiancee reported him missing.

A sheriff’s deputy found Oakes and Opdycke at her home. Oakes asked to go outside and get some medicine out of his car, then threw a plastic bag containing a .22-caliber pistol over an embankment, authorities said.