
A Minnesota cybersecurity and pc forensics professional whose testimony has featured in hundreds of courtroom trials over the previous 30 years is dealing with questions on his credentials and an inquiry from the Federal Bureau of Investigation (FBI). Authorized specialists say the inquiry may very well be grounds to reopen quite a few adjudicated circumstances wherein the professional’s testimony could have been pivotal.

One may conclude from studying Mr. Lanterman’s LinkedIn profile that has a level from Harvard College.
Mark Lanterman is a former investigator for the U.S. Secret Service Electronics Crimes Job Drive who based the Minneapolis consulting agency Laptop Forensic Providers (CFS). The CFS web site says Lanterman’s 30-year profession has seen him testify as an professional in additional than 2,000 circumstances, with expertise in circumstances involving sexual harassment and office claims, theft of mental property and commerce secrets and techniques, white-collar crime, and sophistication motion lawsuits.
Or a minimum of it did till final month, when Lanterman’s profile and work historical past had been quietly faraway from the CFS web site. The elimination got here after Hennepin County Legal professional’s Workplace mentioned it was notifying events to 10 pending circumstances that they had been unable to confirm Lanterman’s instructional and employment background. The county lawyer additionally mentioned the FBI is now investigating the allegations.
These allegations had been raised by Sean Harrington, an lawyer and forensics examiner primarily based in Prescott, Wisconsin. Harrington alleged that Lanterman lied below oath in courtroom on a number of events when he testified that he has a Bachelor of Science and a Grasp’s diploma in pc science from the now-defunct Upsala Faculty, and that he accomplished his postgraduate work in cybersecurity at Harvard College.
Harrington’s claims gained steam because of digging by the legislation agency Perkins Coie LLP, which is defending a case whereby a shopper’s laptop computer was forensically reviewed by Lanterman. On March 14, Perkins Coie attorneys requested the decide (PDF) to strike Lanterman’s testimony as a result of neither he nor they might substantiate claims about his instructional background.
Upsala Faculty, positioned in East Orange, N.J., operated for 102 years till it closed in 1995 after a interval of declining enrollment and monetary difficulties. Perkins Coie informed the courtroom that they’d visited Felician College, which holds the transcripts for Upsala Faculty throughout the years Lanterman claimed to have earned undergraduate and graduate levels. The legislation agency mentioned Felician had no document of transcripts for Lanterman (PDF), and that his identify was absent from all the Upsala Faculty pupil yearbooks and graduation packages throughout that interval.
Reached for remark, Lanterman acknowledged he had no strategy to show he attended Upsala Faculty, and that his “postgraduate work” at Harvard was actually an eight-week on-line cybersecurity class known as HarvardX, which cautions that its certificates shouldn’t be thought of equal to a Harvard diploma or a certificates earned via conventional, in-person packages at Harvard College.
Lanterman has testified that his first job after school was serving as a police officer in Springfield Township, Pennsylvania, though the Perkins Coie attorneys famous that this position was omitted from his resume. The attorneys mentioned after they tried to confirm Lanterman’s work historical past, “the police division responded with a narrative that might be nearly unattainable to consider if it was not corroborated by Lanterman’s personal e mail communications.”
As recounted within the March 14 submitting, Lanterman was deposed on Feb. 11, and the next day he emailed the Springfield Township Police Division to see if he might have a peek at his previous personnel file. On Feb. 14, Lanterman visited the Springfield Township PD and requested to borrow his employment document. He informed the officer he spoke with on the cellphone that he’d just lately been instructed to “get his affairs so as” after being recognized with a grave coronary heart situation, and that he needed his previous file to indicate his household about his early profession.
In keeping with Perkins Coie, Lanterman left the Springfield Township PD along with his personnel file, and has not returned it as promised.
“It’s stunning that an professional from Minnesota would journey to suburban Philadelphia and abscond along with his decades-old personnel file to obscure his background,” the legislation agency wrote. “That seems to be the worst and most egregious type of spoliation, and the deception alone is motive sufficient to exclude Lanterman and contemplate sanctions.”
Harrington initially contacted KrebsOnSecurity about his considerations in late 2023, fuming after sitting via a convention speech wherein Lanterman shared paperwork from a ransomware sufferer and informed attendees it was as a result of they’d refused to rent his firm to carry out a forensic investigation on a latest breach.
“He claims he was concerned within the Martha Stewart investigation, the Bernie Madoff trial, Paul McCartney’s divorce, the Tom Petters investigation, the Denny Hecker investigation, and plenty of others,” Harrington mentioned. “He claims to have been invited to talk to the Supreme Courtroom, claims to coach the ‘whole federal judiciary’ on cybersecurity yearly, and is a school member of the US Judicial Convention and the Judicial Faculty — positions which he obtained, partly, on a home of fraudulent playing cards.”
In an interview this week, Harrington mentioned courtroom paperwork reveal that a minimum of two of Lanterman’s earlier purchasers complained CFS had held their knowledge for ransom over billing disputes. In a declaration (PDF) dated August 2022, the co-founder of the legislation agency MoreLaw Minneapolis LLC mentioned she employed Lanterman in 2014 to look at a number of digital gadgets after studying that one in every of their paralegals had a felony fraud historical past.
However the legislation agency mentioned when it pushed again on a consulting invoice that was far larger than anticipated, Lanterman informed them CFS would “escalate” its assortment efforts in the event that they didn’t pay, together with “a declare and lien in opposition to the info which is able to end in a public public sale of your knowledge.”
“All of us had been flabbergasted by Mr. Lanterman’s e mail,” wrote MoreLaw co-founder Kimberly Hanlon. “I had by no means heard of any reputable forensic firm threatening to ‘public sale’ off an lawyer’s knowledge, significantly understanding that the info is comprised of confidential shopper knowledge, a lot of which is delicate in nature.”
In 2009, a Wisconsin-based manufacturing firm that had employed Lanterman for pc forensics balked at paying an $86,000 bill from CFS, calling it “extreme and unsubstantiated.” The corporate informed a Hennepin County courtroom that on April 15, 2009, CFS carried out an public sale of its commerce secret info in violation of their confidentiality settlement.
“CFS seen and carried out a Public Sale of digital info that was entrusted to them pursuant to the phrases of the engagement settlement,” the corporate wrote. “CFS submitted the very best bid on the Public Sale within the quantity of $10,000.”
Lanterman briefly responded to an inventory of questions on his background (and up to date coronary heart prognosis) on March 24, saying he would ship detailed replies the next day. These replies by no means materialized. As an alternative, Lanterman forwarded a latest memo he wrote to the courtroom that attacked Harrington and mentioned his accuser was solely attempting to take out a competitor. He has not responded to additional requests for remark.
“Once I attended Upsala, I used to be a commuter pupil who lived with my grandparents in Morristown, New Jersey roughly half-hour away from Upsala Faculty,” Lanterman defined to the decide (PDF) overseeing a separate ongoing case (PDF) wherein he has testified. “With restricted assets, I didn’t take part in campus social occasions, nor did I attend commencement ceremonies. In 2023, I confirmed with Felician College — which maintains Upsala Faculty’s information — that they might not find my transcripts or diploma, a scenario that they indicated was probably as a consequence of unresolved money-related points.”
Lanterman was ordered to look in courtroom on April 3 within the case defended by Perkins Coie, however he didn’t present up. As an alternative, he despatched a message to the decide withdrawing from the case.
“I’m 60 years previous,” Lanterman informed the decide. “I created my enterprise from nothing. I’m accomplished coping with the likes of people like Sean Harrington. And fairly frankly, I’ve been planning at turning over my enterprise to my kids for years. That point has arrived.”
Lanterman’s letter leaves the impression that it was his choice to retire. However in response to an affidavit (PDF) filed in a Florida case on March 28, Mark Lanterman’s son Sean mentioned he’d made the tough choice to ask his dad to step down given all of the unfavorable media consideration.
Mark Rasch, a former federal cybercrime prosecutor who now serves as counsel to the New York cybersecurity intelligence agency Unit 221B, mentioned that if an professional witness is discredited, any defendants who misplaced circumstances that had been strongly influenced by that professional’s conclusions at trial might have grounds for enchantment.
Rasch mentioned legislation corporations who suggest an professional witness have an obligation in good religion to vet that professional’s {qualifications}, understanding that these credentials might be topic to cross-examination.
“Federal guidelines of civil process and proof each require specialists to listing each case they’ve testified in as an professional for the previous few years,” Rasch mentioned. “A part of that due diligence is pulling up the outcomes of these circumstances and seeing what the character of their testimony has been.”
Maybe essentially the most well-publicized case involving important forensic findings from Lanterman was the 2018 conviction of Stephen Allwine, who was discovered responsible of killing his spouse two years earlier after makes an attempt at hiring a hitman on the darkish internet fell via. Allwine is serving a sentence of life in jail, and continues to take care of that he was framed, casting doubt on pc forensic proof discovered on 64 digital gadgets taken from his dwelling.
On March 24, Allwine petitioned a Minnesota courtroom (PDF) to revisit his case, citing the accusations in opposition to Lanterman and his position as a key witness for the prosecution.