The Scottish musician sang and wrote for Santana for 15 years during the Eighties and early-Nineties Alex Ligertwood, the Scottish musician best known for his lengthy stint as Santana’s vocalist , has died at the age of 79. Ligertwood’s wife and agent, Shawn Brogan, confirmed his death in a statement shared on social media over the weekend. She said Ligertwood died “peacefully in his sleep with his doggy Bobo by his side” at his home in Santa Monica. No cause of death was given.  “Alex was loved by so many. If you knew him, you loved him,” Brogan said. “He touched so many with his extraordinary voice. He was all heart and soul. His favorite thing in life was to make music, sing and to share his gift with us. He performed his last show just two weeks ago. I’m grateful for that. He did it his way, on his terms, till the end. I will always love you, my sweet Alex. Rest in peace.…