Aug. 25, 2011: Investigators and forensic specialists comb the home that Powell shared with his father and his two boys. Police say that they removed at least three computers and four boxes of material from the home.
Meanwhile, Steven Powell says that he plans to post his daughter-in-law's teenage journals on the website SusanPowell.org; he reportedly says that the journals show that his daughter-in-law is capable of walking out on her husband and their two sons.
In an interview with "Good Morning America" Steven Powell makes new claims that he had a flirtatious relationship with his daughter-in-law that was "a little beyond the pale."
"Father-in-law - daughter-in-law flirting with each other, maybe some sexual touching or whatever," Steven Powell said of the relationship that he developed with his son's wife, adding that he started to fall in love with her, and stated, "there's no question in my mind that the feelings were mutual."
Sept. 14, 2011: Utah authorities find a shallow grave in the mountains of Utah, which they believed might contain the remains of Powell. However no bones, tissue or definitive evidence related to Powell was found in the grave site, which was near Topaz Mountain -- 30 miles south of where Josh said he took the boys camping the night Susan disappeared.
Sept. 22, 2011: Steven Powell is charged with using a telephoto lens to take photos of two young girls in the bathroom of a neighboring house. The photos, which were found during the August search of his home, are among thousands he secretly took of women's buttocks and breasts, according to charges filed against him. Powell was charged with 14 counts of voyeurism and one count of child pornography and held on $200,000 bail.
Josh Powell is named a "subject" in the child porn investigation, according to assistant Attorney General for Washington John Long.
Susan Powell's parents file to gain custody of the two boys in court the following day.
Sep. 23, 2011: A judge issues a permanent injunction that forbids the Powell men from publishing any material from Susan Powell's journals.
Sept. 28, 2011: Josh and Susan Powell's two boys are ordered by a Washington court to remain in the custody of her parents Chuck and Judy Cox, because they had been living in a dangerous home environment with sexually explicit material, and because of the possibility that Josh Powell participated in the voyeurism and child pornography charges against his father. He is, however, granted visitation rights with his boys.
Feb. 1, 2012: A judge rules that the two boys are to remain with their grandparents, the Coxes, while Josh Powell is ordered to take a psychosexual evaluation and polygraph test in order to get his boys back. Police noted that information and images were found on Josh Powell's computer that "specifically related to their children's welfare."
In an affidavit to the court, Josh Powell pled his case that his boys should be with their father.
"For over four months already, my interactions with my sons and many other aspects of my character have been investigated and documented … I have proven myself as a fit and loving father who provides a stable home even in the face of great adversity. ... It is time for my sons to come home."
Feb. 5, 2012: Josh Powell sets off an explosion at his Washington home today that killed himself and his two sons.
"I'm sorry, goodbye," Powell wrote in an email to his attorney.