In season 4, Booth learns about Sweets' abusive childhood and eventually takes Sweets under his wing and regularly takes Sweets to interrogations or to analyze crime scenes for insight into the victim.
Booth learns about Sweets' abusive childhood. This is in season 4. Booth eventually takes Sweets under his wing. This is in season 4. Booth regularly takes Sweets to interrogations or to analyze crime scenes for insight into the victim. This is in season 4.