Steve Powell was the father of Joshua Powell, the Utah and later Washington State man who was a suspect in the disappearance of his wife, Susan Cox Powell, before he blew himself up with their two sons in a grisly explosion.

For years, people believed that Steve Powell might have some knowledge that could lead to resolution in the missing person’s case. Where is Steve Powell now? That resolution will no longer come. Steve Powell died in 2018, a year after he was released from prison for child pornography charges. His own arrest was but one of many bizarre twists in the case.

Susan Powell was a married mother of two from Utah who vanished in 2009. Susan Powell is still missing. Her disappearance is the subject of a Dateline special on October 4, 2019. Susan Powell was last seen in West Valley City, Utah. Charley Project describes her as “Caucasian female. Brown hair, blue eyes. Susan’s maiden name is Cox and some agencies refer to her as Susan Cox Powell.”

In an even stranger development, Steve Powell told ABC News before he died that he interacted with Susan “in a lot of sexual ways. Because Susan enjoys doing that.” He said he started falling in love with Susan. “Yeah, I would say so. And there’s no question in my mind that the feeling was mutual.” He said “Susan was very sexual with me. She was very flirtatious. I’m her father in law and she would do a lot of things.”

Here’s what you need to know about Steve Powell and his death:

Steve Powell Died of a Heart Attack

The “Delusional” Behavior Of Steve Powell Explored | The Disappearance of Susan Cox PowellProfessor of Psychology at John Jay College of Criminal Justice and expert in abuse Dr. Chitra Raghavan describes Steve Powell’s behavior and what it might have meant for his daughter-in-law Susan Cox Powell before she disappeared in 2009. ►► Subscribe to Oxygen on YouTube: https://www.youtube.com/c/OxygenTV?sub_confirmation=1 Oxygen Official Site: https://www.oxygen.com/ Follow Oxygen: On Facebook https://facebook.com/oxygennetwork On… 2019-05-02T14:31:30.000Z

In 2018, Steve Powell died of a heart attack at a hospital in Tacoma, Washington, according to the Salt Lake Tribune. He was only 68 years old. Powell went to prison but not for Susan Powell’s disappearance, and he was already behind bars when his son, Josh, killed himself and Josh’s two sons.

According to the Tribune, Powell was convicted of crimes “related to photographing neighbor girls as young as 8 through their bathroom window.” However, his other son, Michael Powell, committed suicide too, and so Steve Powell’s death extinguished one final pathway to learning what happened to the missing woman, The Tribune reported. He served 3 years in prison and jail but was released on parole before his death.

The Tribune reported that Steve Powell and his wife Terrica Martin had five children. Josh and Michael are deceased. Jennifer, John, and Alina survived. Terri and Steve Powell divorced; he left the LDS church. Despite his legal troubles, the newspaper reported that Steve Powell had a complicated personality. To some, he appeared to be a “doting husband and father, the songwriter inspired by a rocky childhood, the friendly neighbor ready to lend a hand, the seasoned salesman,” according to the newspaper.

Michael Powell, 30, committed suicide by jumping off a building in Minneapolis, according to the newspaper.

The Tribune reported that Susan Powell’s emails indicated she wasn’t always comfortable around Steve Powell. “She wrote of being uncomfortable with a song that her father-in-law, Steven Powell, wrote about her. She also wrote that Steve Powell once tried to console her about her problems with Josh,” the newspaper reported.

Steve Powell’s Computer Had Graphic Photos of Neighbor Children On It, Police Say

Secret Recording Captures Steve Powell Confessing He's 'In Love' To His Daughter-In-LawSteve Powell recorded hours of his daughter-in-law Susan Cox Powell. Many times it appears without her knowledge. An expert in abuse breaks down Susan’s response when Steve says in recorded audio he has “fallen in love with [her].” ►► Subscribe to Oxygen on YouTube: https://www.youtube.com/c/OxygenTV?sub_confirmation=1 Oxygen Official Site: https://www.oxygen.com/ Follow Oxygen: On Facebook https://facebook.com/oxygennetwork On… 2019-05-08T15:54:47.000Z

Steve Powell was never accused of having any connection to his daughter-in-law’s disappearance. However, police still discovered very disturbing information about him during the search for answers.

According to a State of Washington court decision, Susan Powell’s father-in-law Steve Powell was convicted of “second degree possession of depictions of a minor engaged in sexually explicit conduct. The conviction was based on the seizure during the execution of a search warrant of images of children who were his former neighbors.”

The charges were very disturbing and the photos were discovered as authorities looked for evidence in Susan’s disappearance.

The court records say that “After Susan’s disappearance, Joshua and his two young children moved from Utah to Washington to live with Powell. While investigating Susan’s disappearance, Utah police found a journal belonging to Susan at her workplace. Powell and Joshua then announced to media that they had numerous journals belonging to Susan that contained over 2,000 pages of additional journal entries. Powell and Joshua also indicated that the journals they possessed contained information important to the investigation.”

However, when authorities searched the home looking for this information, they discovered something else altogether, the court records say. “Officers from Pierce County and Utah executed the search warrant on Powell’s home. They seized computers, hard drives, discs, a camcorder, videos, and notebooks during the search,” the court records say. “One disc seized from Powell’s bedroom contained numerous photos and videos carefully cataloged into folders. One such folder was titled ‘Neighbors,’ which contained subfolders titled ‘Open Window in Back House,’ ‘Taking Bath-1,’ and ‘Taking Bath-2.'”

The records continued, “The subfolders contained numerous images of young girls, including two who were later identified as Powell’s 8-year-old and 10-year-old neighbors. The images were taken through Powell’s window, looking into the bathroom of the neighboring house. They depicted the girls in the bathtub, going to the bathroom, and changing clothes. Some images captured and focused in on the young girls’ exposed genital regions.”

Steve Powell received 30 months’ confinement time. He later received 60 more months for other related charges. He was paroled in 2017, according to Investigation Discovery Channel.

Oxygen reports that Steve Powell also recorded hours of his daughter-in-law, sometimes without her knowledge.

Steve Powell Suspected His Own Son in Susan’s Disappearance Even Before Josh Committed Murder/Suicide

Josh Powell, 2 young sons, killed in house explosionhttp://puyallup.komonews.com/news/crime/716656-adult-2-children-killed-explosion-josh-powell-home A powerful explosion and fire at the home of Josh Powell killed him and his two young sons Sunday, authorities said, more than two years after Powell's wife Susan vanished under suspicious circumstances. The explosion shook the normally quiet cul-de-sac neighborhood where Powell had been living http://puyallup.komonews.com/news/crime/716656-adult-2-children-killed-explosion-josh-powell-home 2012-02-06T02:24:18.000Z

Steven Powell’s journals revealed he suspected his own son, according to KSL News Radio. “The story is so implausible, and our conversation with Josh so unconvincing that I fear the worst,” Steven wrote of Josh’s tale of going on a midnight camping trip in a snowstorm, according to the station. “The whole thing sounds so wrong, even if it had nothing to do with disposing of Susan’s body. Why would anybody do that?”

The grisly deaths of Josh Powell and his two sons were horrific. It was 2012, three years since his wife’s disappearance, and Josh Powell was 36 years old. Charles was now 7 and Braden was 6 when the boys died.

According to ABC News, Josh Powell took a hatchet to the boys, wounding them but not killing them initially. Then, he set off a “gas-fueled explosion” that killed Powell and the children.

It was supposed to be a supervised visit, ABC reported, and Josh had recently given away the children’s toys. According to ABC News, a social worker was at the scene but Josh “shut and locked the door before the social worker could enter. Moments later, the house smelled of gas and erupted in a ball of flames.” He had lost custody of the boys after his father’s arrest. Images of concern were also found on Josh’s computer, ABC reported.

Susan Powell's Husband Breaks Silence: Josh Powell's Claims Denied by Missing Utah Woman's DadJosh Powell gives his first interview since his wife disappeared in 2009. For more on this story, click here: http://abcnews.go.com/US/susan-powell-mystery-father-law-shocker-love-interest/story?id=14376963 2011-08-25T15:23:10.000Z

Court records in a wrongful death lawsuit Susan’s parents filed against the state in the death of her children say that, in December 2009, “Susan Powell disappeared from the Utah home she shared with her husband, Joshua Powell and their two boys. Joshua, the lead suspect in Susan’s disappearance, subsequently moved with the two boys to his father Stephen Powell’s home in Washington.”

According to the Charley Project, which is a missing persons’ website, Susan Powell’s friend had lunch with Susan and her husband Josh Powell at the Powell home on December 6, 2009. At the time, Susan and Josh had been married for eight years. The friend didn’t notice anything amiss.

However, the next day, neither Susan nor Josh showed up for work. They also didn’t let their employers know what was going on or drop their two children – Charlie, 2, and Braden, 4 – off at daycare, according to Charley Project. At first, authorities put out a missing person’s bulletin for Susan, Josh and both children.

That evening, though, Josh returned home with the children. He claimed that he had taken the children camping and didn’t know where his wife was. No one has ever seen Susan Powell again.

The oldest boy had started verbalizing details of the camping trip, claiming he saw Susan in the trunk of the car, according to ABC. Court records say that on September 28, 2011, the Superior Court of Washington, County of Pierce, Juvenile Court “issued orders placing the two boys in the custody of DSHS; authorizing placement with the Coxes (Susan’s parents); allowing Joshua weekly visits with the two boys under supervision by a DSHS-approved provider; and prohibiting Joshua from either discussing pending litigation with the boys or making disparaging remarks about the Coxes.”