Detective Brian Patterson, who read the document aloud, said investigators also found whips, paddles, videos and other evidence of a sex bondage activity at Maraglino's home in Fallbrook, north of San Diego.
Another San Diego County sheriff's detective, Daniel Pierce, testified that cellphone towers traced Lopez's phone to the area where Killgore's body was found. The phone was located in the area shortly before 4 a.m., several hours after Killgore disappeared.
Last week, Elizabeth Hernandez, who was identified in court as the victim's best friend, testified that she and Killgore became acquainted with the defendants in 2011 after Hernandez responded to an ad selling a fertility monitor on a website used by military families. She said they used to socialize with them but never participated in their alternative lifestyle in which Perez played the master, Maraglino was the mistress and Lopez was the slave.
Hernandez testified that she and Killgore had a falling out in 2012 as the victim prepared to divorce her husband, Lance Cpl. Cory Killgore, who was serving in Afghanistan at the time of his wife's death.
She said Brittany Killgore started dating Hernandez's brother, and they started referring to her as "the disease."
Perez told investigators he dropped off Killgore in downtown San Diego's bustling Gaslamp District, but investigators concluded that he lied about his whereabouts and stayed in Fallbrook.
Perez was the first to be arrested on suspicion of possessing a stolen assault rifle and was later charged with murder. Lopez was arrested two days later at a San Diego hotel where authorities said she was discovered with self-inflicted cuts.
Associated Press writer Julie Watson contributed to this report.