Slashdot summary:

Matthew David Keirans, 58, was convicted of one count of false statement to a National Credit Union Administration insured institution -- punishable by up to 30 years in federal prison -- and one count of aggravated identity theft -- punishable by up to two years in federal prison. Keirans worked as a systems architect in the hospital's IT department from June 28, 2013 to July 20, 2023, when he was terminated for misconduct related to the identity theft investigation. Keirans worked at the hospital under the name William Donald Woods, an alias he had been using since about 1988, when he worked with the real William Woods at a hot dog cart in Albuquerque, N.M. [...] By 2013, Keirans had moved to eastern Wisconsin. He started his IT job with UI Hospitals and worked remotely. He earned more than $700,000 in his 10 years working for the hospital. In 2023, his salary was $140,501, according to the hospital.

In 2019, the real William Woods was homeless, living in Los Angeles. He went to a branch of the national bank and explained that he recently discovered someone was using his credit and had accumulated a lot of debt. Woods didn't want to pay the debt and asked to know the account numbers for any accounts he had open at the bank so he could close them. Woods gave the bank employee his real Social Security card and an authentic California Identification card, which matched the information the bank had on file. Because there was a large amount of money in the accounts, the bank employee asked Woods a series of security questions that he was unable to answer. The bank employee called Keirans, whose the phone number was connected to the accounts. He answered the security questions correctly and said no one in California should have access to the accounts. The employee called the Los Angeles Police Department, and officers spoke with Woods and Keirans. Keirans faxed the Los Angeles officers a copy of Woods' Social Security card and birth certificate, as well as a Wisconsin driver's license Keirans had acquired under Woods' name. The driver's license had the name William David Woods -- David is Keirans' real middle name -- rather than William Donald Woods. When questioned, Keiran told an LAPD officer he sometimes used David as a middle name, but his real name was William Donald Woods. The real Woods was arrested and charged with identity theft and false impersonation, under a misspelling of Keirans' name: Matthew Kierans.

Because Woods continued to insist, throughout the judicial process, that he was William Woods and not Matthew Kierans, a judge ruled in February 2020 that he was not mentally competent to stand trial and he was sent to a mental hospital in California, where he received psychotropic medication and other mental health treatment. In March 2021, Woods pleaded no contest to the identity theft charges -- meaning he accepted the conviction but did not admit guilt. He was sentenced to two years imprisonment with credit for the two years he already served in the county jail and the hospital and was released. He was also ordered to pay $400 in fines and to stop using the name William Woods. He did not stop. Woods continued to attempt to regain his identity by filing customer disputes with financial organizations in an attempt to clear his credit report. He also reached out to multiple law enforcement agencies, including the Hartland Police Department in Wisconsin, where Keirans lived. Woods eventually discovered where Keirans was working, and in January 2023 he reached out to the University of Iowa Hospitals' security department, who referred his complaint to the University of Iowa Police Department.

University of Iowa Police Detective Ian Mallory opened an investigation into the case. Mallory found the biological father listed on Woods' birth certificate -- which both Woods and Keirans had sent him an official copy of -- and tested the father's DNA against Woods' DNA. The test proved Woods was the man's son. On July 17, 2023, Mallory interviewed Keirans. He asked Keirans what his father's name was, and Keirans accidentally gave the name of his own adoptive father. Mallory then confronted Keirans with the DNA evidence, and Keirans responded by saying, "my life is over" and "everything is gone." He then confessed to the prolonged identity theft, according to court documents.