The Simpsons (1989)

S14E8 The Dad Who Knew Too Little

In an effort to uncover more about Lisa, Homer enlists the help of a private investigator. However, when he balks at covering the detective's costs, the investigator takes matters into his own hands by falsely implicating Lisa in a crime. This puts both Lisa and Homer in a precarious situation, causing them to flee as they try to prove her innocence.