A woman fishing with her husband on the Medford side of Lower Mystic Lake Sunday evening called police at about 6:45 p.m. after she spotted a man with his pants around his knees on the Arlington side who appeared to be masturbating, according to Arlington police.
The woman, who was near Mystic Valley Parkway in Medford, told police that she first yelled over to the man that she could see him and told him to stop. She said the man continued until she yelled over that she was going to call police. The man then ran away from the lake, toward East Arlington/Somerville, she said.
She described the man as a white male in his 40s, wearing a gray T-shirt and royal blue shorts. Police were unable to locate the man.