But Reed and his family claimed in a statement to CNN that the charges were false and accused the Russian police of making false and contradictory statements and suppressing evidence that could exonerate him.
"I think anyone who has eyes and ears and who has been in this courtroom knows that I'm not guilty", Reed said. "I will be asking my government for political support", he added.
The embassy sent representatives to each of Reed's court hearings, but generally adopted a more restrained public posture toward the trial than it did with the Whelan case - which saw Sullivan frequently take strongly worded public stands against the proceedings.
Reed, 29, says he has no memory of the events that led to the charge.More news: Thousands march in Germany against Covid curbs
While inside the police auto, Reed is said to have grabbed the police officer driving, causing him to swerve dangerously, and elbowed another officer who tried to intervene.
On Thursday, Reed was sentenced in a Russian court following a trial in which the prosecution's case and the evidence presented against him were so preposterous that they provoked laughter in the courtroom, a statement from U.S. Ambassador to Russia John Sullivan says.
Reed was charged with endangering the lives of the police officers. Russian authorities say the 28-year-old grabbed the arm of the driving officer, causing him to swerve into another lane, and elbowed another officer who tried to intervene.
Reed's family called the verdict "completely unfair", branding the court "corrupt".
Tsybulnik told RFE/RL that when she arrived at the police station later, Reed was being questioned, without a lawyer or interpreter present, by two men who introduced themselves as employees of the Federal Security Service (FSB).More news: Hurricane Isaias on track for eastern Canada
In June, Russia sentenced another USA citizen, Paul Whelan, to 16 years in a high-security prison on spying charges.
His defence team has pointed to discrepancies in the evidence given by the police officers. He has pleaded not guilty to the charge, saying he remembers nothing of the incident.
CCTV footage presented in court did not appear to show the vehicle swerve. Whelan argued he was the victim of an entrapment scheme by someone he met online, who his family accused of being a Russian intelligence agent.
The case has attracted attention owing to the lengthy sentence faced by a United States citizen and speculation in Russian and USA media that Reed could become part of a prisoner swap.More news: Pandemic effects could be felt for 'decades to come': World Health Organization chief