On a spring day in May 1960, a baby boy was born in Milwaukee, Wisconsin.

His parents — a young chemistry student and a machine instructor — welcomed him with hope and excitement. In his early years, he was described as a cheerful and curious child, full of life and imagination.

But around the age of four, after undergoing a minor surgery, his parents noticed a sudden change. The once-outgoing boy became quiet, withdrawn, and distant.

His home life offered little stability; his father was often away for work and his mother faced ongoing health struggles.