Law & Order S4E6: Pride and Joy

Overview

When building superintendent Frank McKinnon is found murdered in the basement of the building he works and lives in, Logan and Briscoe initially investigate the crime as a potential break-in until forensics discovers that the "break-in" was staged. The state's attention soon turns to Sean, Frank's 17-year-old son. Dr. Olivet determines the son is an abusive sociopath after interviewing him. But when the victim's wife claims that Frank beat his family on a regular basis, Stone and Kincaid try to determine who is telling the truth.