Luke didn't immediately interrogate Boris.
If he wasn't the murderer, the interrogation would be meaningless.
If he was, he wouldn't easily confess without enough evidence.
The key now was to find evidence that he had been at the crime scene during the time the crime occurred.
Luke found Matthew and asked him to investigate the cars registered under Boris's name.
Driving from Las Vegas to Los Angeles was a fast and inconspicuous mode of transport.
According to Ikaline's statement, she had texted Boris at 4 PM on April 30.
If Boris had immediately returned to Los Angeles, he would have arrived no earlier than 7 PM.
Courtney's time of death was between 10 PM and 2 AM.
Therefore, it was very likely that Boris drove to Courtney's home sometime between 7 PM and 2 AM.
Considering that the dentist, Peter, was at Courtney's home from 9 PM to midnight,
Boris likely arrived after he had left.
Investigation should focus on the time period between midnight and 1:30 AM.
