An Idaho couple who helped police with information that led to Patrick Frazee's arrest in the murder of Kelsey Berreth is now being criticized. The brother of the missing Colorado mom, who is now presumed dead, slammed Joe and Patty Rockstahl, owners of Rockstahl Law Offices, for withholding information until a reward was offered in the case. 

The couple who was told by one of their employees about her best friend's alleged partner planning a murder called the FBI after officials announced a $25,000 reward for anyone with information about the missing mom. The Rockstahls told CBS-affiliated television station KMVT last week they first heard about the alleged murder plan of a woman in October, two months before Berreth went missing.

They called the FBI only on Dec. 17, weeks after Berreth disappeared on Thanksgiving Day. While the information shared by the Rockstahls may have led to the arrest of Frazee, who has been charged with killing the mother of his child, many criticized the couple for not speaking out sooner.

"Wow! Owners of a law firm and they didn’t do a DAMN thing. Heroes?!?! Are you f------ kidding me?!?! They’re monsters!" wrote the victim's brother Clint Berreth on Facebook.

The Rockstahls were being hailed as "heroes" after their interview with KMVT about the alleged mistress of Frazee who told an employee at their firm about a man who wanted her "to kill the mother of his child."

Another Facebook user commented on the post, saying: "YES... monsters! As soon as I heard that, I thought the exact same thing. OMG. Kelsey would be alive right now. I am heartbroken over the whole thing. But to know she could have been saved is beyond my comprehension. WTF were they thinking."

Some Facebook users commented on Clint's post, saying the Rockstahls were cowards as they did not inform police about someone's plan to kill a woman. Clint responded to the comment: "Those are my exact thoughts too. Hopefully, they’re [sic] business folds following this."

Berreth's brother also said he did not trust the couple's story: "I’m beginning to wonder if these people are full of s--- and just feeding a story for a reward."

crime scene tape Police are still searching for the body of missing Colorado mom Kelsey Berreth, who is now presumed dead after she disappeared on Thanksgiving Day. This is a representational image of a police tape in the Squirrel Hill neighborhood of Pittsburgh, Oct. 27, 2018. Photo: Getty Images/Brendan Smialowski

According to Mail Online, the Rockstahls tried to defend themselves following the backlash, saying they did not accept the reward for providing information related to the case.

Krystal Lee, the alleged mistress of Berreth's fiance Frazee, is the woman who spoke to the Rockstahls' employee. According to the Rockstahls, they told their employee to ask her friend to come forward, but Lee told her "to forget the whole thing" about her disclosing the murder plan. The couple said they felt they didn't have enough information at the time to report anything to the police.

It was only when they saw Berreth's mother's plea to find her daughter on national television that they began to connect the dots with the information they had. 

Within four days of them making the call to the FBI, Frazee was arrested and charged with five counts of murder, including two counts of first-degree murder and three counts of solicitation to commit first-degree murder.

Berreth was last seen on Thanksgiving Day with her daughter at a Safeway in Woodland Park. Three days after Thanksgiving, Berreth’s cell phone pinged near Gooding, Idaho, just 40 miles from Twin Falls. Police believe the woman was murdered at her Woodland Park home. However, her body or remains were yet to be found.

During the investigation, police also questioned Lee, who they believed may have helped Frazee dispose of a cell phone that belonged to Berreth. According to Mail Online, the 32-year-old nurse likely had a romantic relationship with Frazee.

Last week, Berreth's family filed a wrongful death lawsuit against Frazee. In the complaint, they wrote Frazee "enacted physical, mental, and emotional acts of violence upon Kelsey Berreth prior to her death." It also states that "when Frazee acted as either the perpetrator or accessory to the murder of Kelsey Berreth, Frazee breached the duty of care with which a reasonable person should conduct himself toward another human being."