He went on to tell detectives "about the Masons and the Eastern Star symbol" that he said popped up on the phone, but what he said "didn't make any sense," Moorian added. In an interview with another detective, Dalton said when he saw the Uber app shift from a red color to black, that is when he would get taken over "like a puppet."
Uber declined to comment on the report's release and Dalton's statements.
In the days and weeks since Dalton allegedly gunned down random strangers while he was picking up fares for the service, investigators and neighbors alike have said they are baffled by the Feb. 20 rampage.
During the spree, police said that Dalton shot eight people -- six of them fatally -- in three different locations spread over about four hours. The victims included a high school senior and a 74-year-old woman. One of the victims who survived is a 14-year-old who was shot in the head; she was released from the hospital last week and moved to an inpatient rehabilitation center.
Earlier this month, a judge ordered that Dalton undergo a mental competency examination to see if he can stand trial. Jeffrey S. Getting, the Kalamazoo County prosecuting attorney, said Monday he expected the evaluation to be completed soon. Dalton's court-appointed attorney, Eusebio Solis, could not immediately be reached for a comment Monday.
The shooting spree rocked the city of 75,000, and while authorities said Dalton made "incriminating statements" after he was arrested, they said they struggled to find a motivation for what caused the violent eruption. Kalamazoo Public Safety Chief Jeff Hadley called the rampage "baffling."
In the police report released Monday, authorities offer a timeline of their response to the shooting, describing traveling from the scene of Dalton's arrest to informing relatives of one of the victims about their death. They then describe going to Dalton's home, where police say weapons and boxes of ammunition were recovered.
The shooting spree ended when Dalton was taken into custody by police hours after the gunfire began. Moorian wrote that Dalton said he gave up and didn't try to shoot a police officer because the Uber app no longer had control over him. During his interview with authorities, Dalton said he was unable to uninstall the app because "it sort of had you at a certain point," Moorian wrote.