The Latest: Suspected highway shooter's dad suggests someone else might be responsible

ARAPAHO, Okla. (AP) — The latest on a shooting incident in western Oklahoma that left two motorists dead (all times local):

9:45 a.m.

The father of a Texas man being investigated for a pair of suspected random killings along an Oklahoma interstate says someone else might be responsible for the crime.

Robert Hardy, the father of suspect Jeremy Doss Hardy, suggested to The Oklahoman newspaper ( ) that police stopped his son by mistake.

The Oklahoma State Bureau of Investigation said Thursday Hardy's the "only person" being investigated for the shootings.

He is jailed in Custer County on a complaint of driving under the influence and is due to be arraigned on that charge Friday afternoon.

Authorities have said at least four vehicles were hit along a three-county stretch of Interstate 40, killing a man traveling with his wife near Hydro and a woman more than 10 miles away in Weatherford.