depicts. We turn first to Rule 602 and explain our holding there. a. The witness had personal knowledge of many things about which he testified. Rule 602 provides that a witness may not testify to a matter unless evidence is introduced showing that the witness has personal knowledge of the matter. TEX. R. EVID. 602. Appellant contends that Detective Reynolds lacked personal knowledge of the circumstances surrounding Jeff Wright’s death and so his testimony could not support the State’s in-court demonstration of its theory of the case. However, we know Detective Reynolds had personal knowledge of a number of key facts because he was present at the crime scene, viewing both the body and the scene itself. For example, Detective Reynolds knew Jeff Wright was t .-Texarkana 1988, pet. ref'd) (<HOLDING>); see generally 2 STEVEN GOODE, ET AL., GUIDE
holding officers testimony about point of impact automobiles direction of travel and other opinions about crime scene was admissible as both lay opinion and expert testimony in trial for attempted murder of victim struck by automobile when based on personal knowledge and experience recognizing that a common illustration of an admissible opinion under rule 701 is an expression of opinion by a lay observer of a cars speed holding officers testimony about the common use of vise grips to assist in stealing cars was admissible opinion testimony by a lay witness holding that lay opinion testimony is not admissible when the jury can readily draw the necessary inferences and conclusions without the aid of the opinion holding that lay witness opinion as to guilt of defendant inadmissible