CALIFORNIA EVIDENCE: CIVIL AND CRIMINAL
...Opinion & Scientific Evidence
......Lay Opinion
.........Proper Subjects
............Intoxication; Drugs
3 Cards On This Topic:

Lay opinion re D's seeming drug intoxication inadmissible where D did not establish a foundation.

Lay opinion re degree of D's drug-induced intoxication properly admitted; same rules as for lay opinion on alcohol intoxication.

Layman may give opinion, based upon own observations, as to whether another is intoxicated.