A 27-year-old San Diego man on Wednesday pleaded not guilty to multiple felony charges, including manslaughter and driving under the influence, in connection with a five-car crash on Interstate 805 over the weekend that left a grandmother dead and several others injured.
Prosecutors allege Markus Turner smoked marijuana and drank alcohol before getting behind the wheel, hitting more than 100 miles per hour before the crash that unfolded just before 9 a.m. Saturday on the freeway near 43rd Street.
San Diego Fire-Rescue Department May 3…