Appellant, Craig Oliver Markey, was charged by information with driving while intoxicated. He was found guilty by a jury, and he subsequently admitted that he had been previously convicted of driving while intoxicated as alleged in the enhancement paragraph. Accordingly, the trial court suspended appellant's driving privileges for one year and sentenced him to serve 90 days in the Harris County Jail. In four points of error, appellant claims (1) the trial court erred in admitting evidence derived from an unlawful arrest, (2) the evidence was insufficient to support the conviction, (3) the trial court erred in failing to submit an issue to the jury on the legality of appellant's arrest, and (4) the trial court abused its discretion by admitting a visual aid into evidence. We affirm.