By ANDREW DALTON | AP Entertainment Writer LOS ANGELES — Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78....

By ANDREW DALTON | AP Entertainment Writer LOS ANGELES — Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78....

Grateful Dead guitarist and founding member Bob Weir has died at the age of 78, the news confirmed in a statement on his official Instagram account....

Grateful Dead guitarist and founding member Bob Weir has died at the age of 78, the news confirmed in a statement on his official Instagram account....

Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78. ......

Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78. ......

Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78. ......

Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78. ......

Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78. ......

Bob Weir, guitarist, singer and founding member of the Grateful Dead, has died at age 78.