REDWOOD CITY -- A Redwood City man's failing health appears to have pushed him to kill his wife, a San Jose prep school counselor, and then turn the gun on himself, police said Tuesday.

Before shooting Sandra Padgett, 72, in their home last week, John Padgett, 69, recently had some "new diagnoses," said Redwood City police Lt. Sean Hart, who declined to elaborate.

Police have found no indications of other motives, but are still checking some evidence, including the couple's home computer.

"(Health) was most likely a factor in his decision to do this," Hart said.

A neighbor told this newspaper the husband had such severe back problems he was left bent over at a 45 degree angle and used a cane in each hand in order to walk. John Padgett hadn't been seen in recent months, though he used to take regular walks around the neighborhood.

Police first learned of trouble in the Padgett's rental home in the 1700 block of Carleton Court around 12:50 a.m. April 22. The husband had called 911 to get medical assistance for his wife. When authorities arrived they found Sandy Padgett, a longtime college guidance counselor at the Harker School in San Jose, with a fatal gunshot wound to the head.

John Padgett was also shot in the head, but clung to life for three days before dying from his injuries Thursday. Police say they have concluded he did the shooting and were not seeking anyone else for the violence.

Hart declined to say if police found a suicide note. He did, however, reveal the weapon used in the apparent murder-suicide was legally owned by John Padgett.

Sandy Padgett's death drew an outpouring of grief from students and workers at the high-performing K-12 private school, where she served as co-director of college counseling. She joined the school in 1998 and was credited with helping hundreds of students clarify their ambitions and go to college.

"Throughout her long career in independent education she guided countless students through the college counseling process and she was known for her deep knowledge of college counseling as well as her affection for the students," said Chris Nikoloff, head of school, in a statement after her death. "The entire Harker community is grieving over the sudden loss of our longtime colleague."

Contact Joshua Melvin at 650-348-4335. Follow him at Twitter.com/melvinreport.