Benjamin Sebena, of Menomonee Falls, was booked into Milwaukee County Jail on Wednesday night on a tentative charge of first-degree intentional homicide, the Wauwatosa police department said in a statement.
He has not been formally charged in the death of his 30-year-old wife, Jennifer Sebena. A message was left with the district attorney's office seeking comment.
Ben Sebena, 30, is a decorated U.S. Marine who served two tours in Iraq before suffering severe arm and leg injuries in a mortar attack, according to Pastor Scott Arbeiter at Elmbrook Church in nearby Brookfield.
Police officers found Sebena's body in the early hours of Monday morning after she failed to respond to radio calls. She had been shot several times. Police have released few details about the shooting.
Jennifer Sebena had worked for the Wauwatosa police department for two years and her death was the first in active duty in the department's 96-year history. Wauwatosa is a city of about 46,000 people just west of Milwaukee.
Sebena's funeral is scheduled for Saturday.
Dinesh Ramde can be reached at dramde(at)ap.org.