Here's what happened in that Pensieve memory:
* The Crime: Crouch Jr. was convicted of torturing and murdering Frank Bryce, the gardener of the Riddle House (where Voldemort was born). He was also accused of being a Death Eater and committing other heinous crimes.
* The Trial: Crouch Jr. was put on trial for his crimes. The evidence against him was overwhelming.
* The Sentence: Crouch Jr. was sentenced to life in Azkaban prison.
However, it's important to note that Crouch Jr. never actually went to Azkaban. His father, Barty Crouch Sr., used the powerful magic of the Imperius Curse to manipulate the guards and ensure that Crouch Jr. was brought home, where he remained hidden.
The details of Crouch Jr.'s crimes and trial are revealed in the book *Harry Potter and the Goblet of Fire* when Harry witnesses the memory of Crouch Sr. in the Pensieve. This memory is crucial in understanding the events of the fourth book and the true identity of the mysterious "Mad-Eye Moody."