Todashev was released on $3,500 bail after his May 4 arrest. His attorney, Alain Rivas, didn't respond to a call for comment Wednesday.
Todashev was also arrested by Boston police in 2010 after a road rage encounter. Witnesses told police that he argued with two other drivers and cut them off with his vehicle. According to a police report, he yelled, "You say something about my mother, I will kill you."
Todashev's said he was worried that with his son was dead, the FBI could now pin any crime on him.
"Out of fear of the lawlessness in Chechnya, I sent him to the U.S., because it seemed like the safest country at the time," he said. "Now I'm thinking about how to bring home his body. As it turns out, I sent him to his death."