After Dennis Wolter was found covered in blood on May 26, 2011, he maintained during a nearly two-hour interrogation at the Camas Police Station that the blood belonged to his injured black Lab dog, Charlie.Meanwhile, at Wolter’s home in Vancouver, police were discovering a harsher reality.The blood belonged to Wolter’s girlfriend, Kori Fredericksen, whom Wolter murdered with a knife to prevent her from testifying against him in a previous domestic violence case, said Clark County Senior Deputy Prosecutor Camara Banfield.In the second day of testimony Thursday in Wolter’s aggravated murder trial, Vancouver police officers described the scene at the home.Vancouver police officers responded to the home around 1:30 a.m. after Camas police requested a welfare check on Fredericksen and her 8-year-old son. They found a trail of blood from the driveway to the house’s entryway.“There were drag marks,” said Vancouver police Officer Jason Beach. “There were pools of blood sporadically along the blood trail.”Halfway along the bloody trail lay a black sweater riddled with holes, Beach said. Blood was smeared on the doorknob, said Officer Gerardo Gutierrez.The officers knocked on the door. After no answer, Gutierrez and Officer Donald Magarian said they kicked down the door.Inside, there was blood on the walls and carpet and a broken knife blade on the living room floor, Beach said. Five bloody knives with bent or broken knives were in the kitchen sink, he said.