Todd Pollard Smith born 1949 - 1994 was brother to Patti Smith.
Todd Smith mostly helped with technical and production of Patti's albums.
In 1978 Sid Vicious was mocking a bands performance they were on stage, both Patti Smith and Todd Smith were listing to there performance.
Todd asked Sid to tone it down but Sid resumed mocking the band, and Todd tried to escort Sid out of the bar until he retaliated by punching him.
References[]
Who killed Nancy? Movie
https://www.discogs.com/artist/2299436-Todd-Smith-9 for birthdate 27.1.19