Get trained by the Dallas Police Department to volunteer on the Northaven Trail. Friends of Northaven Trail is partnering with DPD North Central on a new program. Join Officer Mark Lutz at the North Dallas Chamber of Commerce (10707 Preston Road) for a two-hour training session on Saturday, Oct. 26, 9-11 a.m. If the program is successful, DPD will expand it to other trails. If you plan to go, send an email or register at Facebook event page.