Another undercover officer has taken the stand in the Dean Penney murder trial, giving jurors a closer look at the controversial “Mr. Big” operation used during the investigation.

Undercover Officer Testifies in Dean Penney Murder Trial Over “Mr. Big” Operation

Mr. Big takes the stand at Dean Penney's murder trial | PNI Atlantic News

Another undercover police officer has testified in the murder trial of Dean Penney, who is accused in the death of his estranged wife, Jennifer Hillier-Penney.

The testimony focused on the so-called “Mr. Big” operation, an undercover police technique used in serious criminal investigations in Canada. In this type of operation, officers pose as members of a fake criminal organization in an attempt to gain a suspect’s trust and gather information.

Dean Penney was focus of a Mr. Big operation that lasted for 50 months |  PNI Atlantic News

Jennifer Hillier-Penney disappeared in Newfoundland and Labrador in 2016. Her body has never been found, but investigators believe she was killed. Dean Penney was later charged with first-degree murder.

In court, the undercover officer described parts of the police operation and how investigators interacted with Penney during the investigation.

Another undercover officer testifies about 'Mr. Big' operation at Dean  Penney murder trial - NTV: Newfoundland and Labrador's Most Trusted News  Source

The “Mr. Big” method has often been controversial because of questions about pressure, reliability, and whether statements made during these operations can be trusted.

The trial continues as Jennifer Hillier-Penney’s family waits for answers nearly a decade after her disappearance.