Nelson-Williams was a lifelong
Wesleyan Methodist and a member of Wesley Methodist Church at Lamina Sankoh Street (formerly Trelawney Street), which was the family church of his paternal family. In the latter years of his life, outside of his medical practice and business interests, Nelson-Williams spent time in the company of a small group of like-minded professional friends at the Brookfields Hotel.
Political activism and social advocacy in the latter years Although Nelson-Williams retained an interest in election to Parliament, he also had a strong role as a social advocate in the latter years of his life. He remained a vocal critic of the governments of
Siaka Stevens and
Joseph Saidu Momoh in the 1970s and 1980s. The rampant corruption and state-sanctioned violence evidenced by the execution of
Mohamed Sorie Forna and the assassination of Samuel Lansana Bangura, which was allegedly sanctioned by the Sierra Leonean government, was fiercely criticized by
Sierra Leoneans such as Nelson-Williams and
Raymond Sarif Easmon. Easmon was briefly jailed by the Siaka Stevens government in the 1970s and eventually was convinced by family and friends to tone down his criticisms of the
Siaka Stevens government. Nelson-Williams would remain a critic of corruption and violence by the state and some reports at the time of his death outline that the Sierra Leonean government was wary of his critiques. ==Assassination==