Shawn Tyson's lawyer Carolyn Schlemmer denied there was a firm link between him and the murders.
She said Tyson was not around when the gun was cleaned, or casings dug up.
The jury heard Tyson can be convicted of first-degree murder because Kouzaris and Cooper died while he was trying to rob them.
Shawn Tyson was found guilty of murdering British tourists James Kouzaris and James Cooper in Sarasota.
Any murder is brutal. These murders seem especially so. So needless, so random, such a waste.
Jury in the trial of the man accused of killing two British tourists has heard how he feared bullets found by police may incriminate him