Grayson County Attorney Joe Brown said he has received calls and e-mails from friends and relatives of the victims opposing the deal, The Dallas Morning News reported Friday.
Miroslaw Janusz Jozwiak is charged in the Sept. 20 collision on U.S. 75 north of Dallas that killed 10 people in two cars. Jozwiak was driving a semi-trailer truck that crossed the median and hit the vehicles, police said.
Cornel Walker, Jozwiak's attorney, said he never presented the offer to his client, a native of Poland who does not speak English.
Jozwiak is jailed in Sherman, Texas, in lieu of a $2 million bond. He is expected to remain there until the trial, which could come in August or September, Walker said.
Brown said a depressant found in a urine sample of Jozwiak causes drowsiness and probably led to the crash. Walker denies that allegation, calling the crash an "unfortunate accident."