A 75-year-old man has been charged with shooting his wife to death at their San Pedro house, prosecutors said Tuesday.

George Matsumoto allegedly killed his 72-year-old wife, Mary, whose body was found Jan. 14 at their house in the 800 block of West 11th Street.

Police discovered her body when a family member asked officers to check on her after not hearing from her for several days.

“When authorities arrived at the victim’s home, they found the defendant inside the location along with Mary Matsumoto’s body,” Deputy District Attorney Kelly Kelley said in a statement.

Matsumoto is charged with one count of murder with a special allegation that he used a gun that caused great bodily injury and death. He pleaded not guilty Tuesday in Long Beach Superior Court.

Matsumoto is being held on $2 million bail and is scheduled to return to court March 4. If convicted, he faces up to 50 years to life in state prison.