Acevedo also added that Barnes "looked great."
"Please continue to lift him and his family and colleagues up in prayer," Acevedo tweeted.
Visited retired @houstonpolice Officer & active @SantaFeISD Police Officer John Barnes today. Although the road to recovery will be long and hard, he is in great spirits & looked great. Please continue to lift him & his family & colleagues up in prayer. #RelationalPolicing— Chief Art Acevedo (@ArtAcevedo) June 4, 2018
Barnes, 49, was injured while confronting the alleged Santa Fe High School shooter on May 18.
He remains at UTMB Galveston.
SANTA FE STRONG: Remembering the victims of the Santa Fe High School shooting