Michael Jason Seibert

Before getting caught in the sting, Seibert was dropped on his head as a baby. Unfortunately, it left a scar on his head, caused him to suffer from seizures, and he suffered from many mental health issues. Seibert was arrested and sentenced to a year in jail after chasing a man and assaulting him with a baseball bat, although the reason why he did so remains unknown, possibly due to the man making fun of Seibert because of his impairments.

Eventually, Seibert arrived at the designated location and immediately headed for the decoy, asking to use the bathroom. Chris Hansen then came out to greet him. Seibert was told to sit down after being startled by Hansen's appearance. When asked about his age, Seibert lied and claimed to be eighteen-years-old. Seibert revealed his age of twenty-five and apologised for lying immediately after Hansen told him to tell the truth. Seibert claimed he was only at the house to speak with the girl. Seibert could only remark, "Oops," in response to the overwhelming evidence against him. Ultimately, Seibert assured Hansen that he was "never going to do it again." For unknown reasons, possibly due to Michael clearly having a mental disability or another suspect scheduled to come in shortly, Hansen did not reveal his involvement with Dateline and did not have the cameras revealed. Instead, he informed Seibert that he was free to leave the sting house. Seibert left the sting house and was taken into custody.

Seibert entered the house after inquiring whether or not anyone else was home. He requested permission to leave but was asked to stay and talk for a while. He apologized and admitted that he had just been in court the day before and had been given more time before the next court date. Seibert tried to leave and asked if he could go home, but Chris told him to stay on the stool. He then began to become nervous and rubbed his eyes. He tried denying that he knew the girls age, but when he was reminded, he claimed he told the girl to leave him alone but she kept messaging him . When questioned about his assault conviction, Seibert admitted to using a bat. Seibert was hesitant to leave, knowing what was out the door. When Chris told Michael it wasn't up to him if he was arrested, Michael whimpered, "Y-Yeah it is!" Like before in Riverside, he claimed he needed to use the restroom before being told to leave again. He eventually left the house and was immediately arrested. He admitted he still lived with his mother and that she would kill him when she found out about his second arrest.

During his police interview, Seibert admitted that he had treatment for seizures and that the scar on his head was induced by a fall when he was a newborn. Seibert was originally charged with four felonies: attempted lewd or lascivious acts with a child under 14 years of age, attempted sodomy with a minor under 14 years of age, attempted harmful matter sent with the intent of seduction of a minor, and attempted oral copulation with a minor under 14 years of age and more than a 10 year age difference between victim and offender. He was initially held without bail before being released.

After being arrested again, the court set Seibert's bail at $1.1 million dollars. Long Beach Superior Court Judge Bradford Andrews usually gave the predators caught in the Long Beach sting lenient sentences due to thinking they were "lonely, desperate people who took their fantasies too far." However, Judge Andrews noted that Seibert would anticipate facing far harsher punishments than the other predators arrested since any past sex offenses immediately revoke the possibility of making a plea deal with prosecutors. Steve Harmon, the attorney representing Seibert, opined in an interview that he found it "very disturbing" that Perverted Justice was on the internet "trolling or fishing" for men who wouldn't have had the "intention to get into this trouble" but were "led into it." Harmon added that Seibert had suffered from "very severe mental issues" due to the brain injury he suffered when he was a baby.

In 2008, Seibert was convicted and found guilty of felony attempted lewd or lascivious acts with a child under 14 years of age and felony attempted harmful matter sent with the intent of seduction of a minor. Seibert could have faced a sentence of ten to twenty years in prison for the numerous crimes he committed, but he was first instead sentenced to three and a half years in prison for his involvement in the Long Beach sting. Following that, he was sentenced to a year and a half in prison for his involvement in the Riverside sting to be served concurrently with his previous sentence. After his release, Seibert was put on probation and was required to register as a sex offender for the rest of his life. According to his Megan's Law profile, he has been classed as an Above Average Risk sex offender.

Seibert was seen by a fan working at a hardware store, and the fan was able to take two photos of him. Another picture was posted of Seibert more up close, with the user claiming that he overheard Seibert boasting to another co-worker about how he had sex with a girl while she was on her period.

Seibert was initially unaired in the Riverside episode, while his uncut interview would later be uploaded to the MSNBC subscription service, and a sample of his Riverside interview and interrogation shown in the Long Beach episode. Only parts of his uncut Long Beach segment have been recovered, and edited together to create a more complete interaction . Previously, Seibert only had a very brief verifier phone call released where he immediately told the decoy he was "sitting here bing bored" before asking if he could call her back, but when Morticia recovered his file from a Perverted Justice archive in 2024, he had roughly half an hour worth of unreleased calls with the decoy, which included him making hilariously obnoxious noises imitating a baby when the decoy told him her aunt had recently given birth.