Here is the SUMMARY!
Back in 2001 Robin Williams met the famous Koko the Gorilla and had a wonderful experience.(See video above) Robin was told after that he made Koko smile for he first time in 6 months.
According to a staffer, when news broke about Robin's death, a Doctor told Koko(through sign language) that they had lost a dear friend. Koko signed "Cry Lip" and seemed to look very sad as seen in the photo at the link.
This video is from 13 years ago when they met. click HERE tosee picture of sad Koko
Now more with Robin Williams .