After six days of testimony, the prosecution rested Friday in the aggravated murder trial of Vancouver resident Dennis Wolter, who’s accused of fatally stabbing his estranged girlfriend, Kori Fredericksen, in May 2011.Prosecutors wrapped up their case in Clark County Superior Court around noon after playing two audio recordings of jailhouse calls by the defendant. Attorney Therese Lavallee launched Wolter’s defense in the afternoon.Some of the words in the audio recording of the calls were unclear, but prosecutors gave the jury transcripts of the calls.In one call on June 24, 2011, Wolter tells Jonathan Luepke, Fredericksen’s stepson from a previous relationship, that one witness “needs to understand there was nothing said.” The person he was referring to was Dannielle Williams, Luepke’s ex-girlfriend, said Vancouver Police homicide Detective Lawrence Zapata. Williams testified Thursday that while she was in custody for a probation violation, she spoke with Wolter outside the Clark County Jail. She said Wolter told her that he killed Fredericksen because she “narced on him.”Zapata said he was concerned about Williams’ safety and arranged for her to be moved to the Skamania County Jail for her protection.In another call on June 9, 2011, to Todd Wilson, Wolter suggests that Fredericksen pushed him too far. Wolter was arrested May 17, 2011, for alleged fourth-degree assault and malicious mischief against Fredericksen. The next day, a judge ordered Wolter not to have any contact with Fredericksen, which meant Wolter wasn’t allowed to return to his own home, where the couple lived together.