During the course of his interrogation after his arrest and at his trial, no clear motive surfaced as to why Roman Zadorov would murder Tair Rada. As Nazareth District Court Judge Yitzhak Cohen noted, however: "Motive is not one of the elements of the crime and the prosecution does not have the burden to prove it."

The judge also made reference to the Daniel Okev case, in which the accused murdered two tourists for no apparent reason. Cohen acknowledged, however, that a motive supplements circumstantial evidence and reinforces its significance.

Under interrogation, Zadorov did raise a number of possible motives.

He recounted, for example, sexual abuse he said he suffered as a child in Ukraine at the hands of teenage girls, one of whom bore a resemblance to Tair Rada.

He said he met Rada about a week before her murder and remembered the girl who was a party to his abuse.

He also described his strained relations with students at the Nofei Hagolan school where Rada's body was found, and how when he refused their requests for cigarettes, they swore at him. He recounted how someone had cut an electric cable he was using. (A few days after the murder a student at the school admitted to Haaretz that she was the one who committed the vandalism. ) He even described how Rada had sworn at him.

Zadorov also allegedly told his jail cellmate, who informed on him, that he had been ready to kill all the students but restrained himself.

There was also evidence of violence in Zadorov's past, directed at his brother and, while he worked as a security guard in Russia, at a group of drunk, rowdy patrons at a nightclub.

Zadorov denied killing anybody but admitted rendering someone disabled. He also made comments that revealed abnormal views of sexuality, in addition to racist views.

The judges noted: "The statements of the accused reveal a bit more about his world and show us a distorted world view with regard to everything related to interpersonal relations."