The defence team also claimed that Mr Floyd could be heard saying "I ate too many drugs" in bodycam footage of the incident.
Mr Stiger testified that he could not hear the phrase in the clip, though another witness, Special Agent James Reyerson of the state Bureau of Criminal Apprehension, initially agreed it appeared to sound that way.
He later retracted that statement, saying he believed Mr Floyd had in fact said "I ain't do no drugs".