Sweet Home Police Department employees and volunteers are making their mark in the annual Polar Plunge fund-raiser for Special Olympics. Team SHPD Super Heroes, above, hit the chilly drink in the Willamette River Feb. 17 in Corvallis. They led the field of 20 teams – about 600 participants – in fund-raising, collecting just shy of $7,000 of the total $57,002 raised by the teams representing law enforcement agencies, businesses, high schools and fraternities from Linn,…