“We waited three years to get back to the same place, where these officers are not going to be held accountable for their actions,” said Gwendolyn Smalls, Lambert’s sister, after leaving the meeting Monday evening.
According to another source with knowledge of the inquiry, the lead prosecutor, Tracy Quackenbush Martin, investigated whether the repeat tasings were the actual cause of Lambert’s death, while another prosecutor, Michael Herring, focused on whether the officers had the criminal intent to harm or kill Lambert.
The prosecutors are expected to release a report of their findings on Tuesday.
Tom Sweeney, who represents Smalls in a civil suit against the police, said he “was disturbed to learn” that the prosecutors “reached out to a paid consultant for Taser International analyzing the decision on whether or not these officers acted within the law.”
The three officers discharged their tasers 20 times during the incident, including while Lambert had his hands and feet bound, a violation of police rules.
The incident had been under investigation since it occurred in May 2013, and drew renewed scrutiny after video of the tasings were exposed by MSNBC in November 2015.
Police files files obtained by MSNBC also suggested police misled investigators about the incident.
Lawyers for the officers have denied any wrongdoing in the case.
In the civil suit regarding his death, his family is arguing police had an obligation to provide him the medical care they initially offered.
Sweeney says the suit is currently on appeal, focusing on a lower court’s ruling “regarding the initial tasings” and whether the police violated the Constitution by depriving Lambert “of medical care.”
Apart from the local investigation and the civil suit, the FBI also recently opened an inquiry into the incident.
Smalls, Lambert’s sister, says that a separate inquiry is welcome because she does not think the local prosecutor was fair or impartial.
“It’s unbelievable, her theory was more supportive to the police officers, because her husband is a sheriff and she works with the police,” Smalls told NBC News.
The prosecutor, Tracy Quackenbush Martin, did not immediately return calls on Monday evening. She has previously said she would take a thorough and fair approach to the case and follow the facts where they lead.
This story originally appeared on NBCNews.com.