[3] Starting in 2021, Blom served his prison sentence at MCF-Oak Park Heights, a maximum-security facility in Stillwater, Minnesota.
[4][5] Before that he spent about 4 years at medium-security prison MCF-Faribault after having been transferred there from maximum-security facility SCI Greene in Pennsylvania.
The same year, he threatened two teenage girls at knifepoint in a remote area, tied them to a tree and put socks in their mouths.
[6] Another witness reported seeing a suspicious man leering at female passersby outside a Subway restaurant in the same building as the convenience store earlier that night.
[6] Blom was working at the Minnesota Veteran's Home under the name "Donald Hutchinson" prior to Poirier's death.
Brown said Hutchinson was absent on the day after Poirier's abduction, had recently cut his hair, had stopped driving his black pick-up truck and without notice quit his job as a janitor.
The search in Moose Lake was supported by over 100 National Guardsmen and several hundred local volunteers who were initially unable to find any trace of Poirier.
On the second day of the search, investigators found what appeared to be bone fragments in a fire pit on Blom's property.
[6] On September 8, Blom confessed to abducting Poirier, strangling her and burning her body in the fire pit on his Moose Lake property, an account which was somewhat inconsistent with the evidence.
Blom stated that he walked out of the store with Poirier and said she asked him to let her go several times, but did not fight with him until he started choking her at his property.
"[6] Blom soon recanted, saying that the stress of the solitary confinement and hallucinations due to "ten medications" had prompted him to make a false confession.
Video surveillance, witness reports, testimonies from two women who Blom kidnapped in 1983 and his confession were presented as evidence against him.
Forensic odontologist Dr. Ann Norrlander testified that the tooth portion recovered from Blom's property was consistent with Poirier's age, gender and dental work.
He said his wife had threatened to commit suicide due to media pressure and that he confessed to the kidnapping in order to get out of his cell.
He said he had been fishing at Moose Lake on the evening of the kidnapping and returned home by 10:00 pm, well before the time of Poirier's abduction.
His wife emailed two Minnesota legislators, stating that she believed him to be Poirier's murderer and that Blom abused her for seven years.
In 2006, Blom expressed his willingness to answer questions about unsolved local crimes in exchange for transfer to a prison closer to his relatives.
[6] Dennis Fier, a Minnesota Bureau of Criminal Apprehension agent, has long suspected Blom to be a serial killer.
According to Fier, Blom admitted that he "often would leave for entire nights, would be using alcohol and drugs and would not remember when he came home the next day, where he had been or what he did.
"[3] At the time of his arrest, investigators were looking at similar crimes, including the murder of 19-year-old Wisconsin student Holly Spangler.
Blom was living in the area under the name "Donald Pince," was a registered sex offender and was one of the top suspects in the case.
[8][9] In 2016, a third Investigation Discovery series See No Evil episode titled "Snatched on Camera" reported on Poirier's murder.