SAN FRANCISCO, CA (REUTERS).- Police investigating the theft of a Pablo Picasso sketch from a San Francisco art gallery impounded a taxicab on Wednesday used as the getaway vehicle, hoping for clues from its surveillance camera. The car was seized a day after an unidentified but smartly dressed thief stole Picasso’s 1965 pencil drawing “Tete de Femme,” which translates as “head of a woman,” according to the Weinstein Gallery. A man in dark glasses walked into the gallery and, before anyone noticed, made off with the sketch and escaped in a taxicab, San Francisco police spokesman Officer Albie Esparza said. The sketch measures about 11 inches by 8 inches. Police learned the name of the cab