This mural is quite old and if memory serves, was vandalized at one time. Behind the palm tree is a portrait of the artist, Manny Acosta. Acosta passed away in 1989. Here is a bit of what Askart.com provides about Acosta:
Born in Chihuahua, Mexico, Manuel Acosta settled in El Paso, Texas where he became a painter, muralist, sculptor and illustrator. He studied at the University of Texas at El Paso and at Chouinard Art Institute in Los Angeles.