CEDAR RAPIDS, Iowa — Prosecutors presented stark physical and digital evidence Friday in the murder trial of McKinley Louisma, including bloodstained weapons and chilling online activities, as they continued to build their case in the February slaying of 20-year-old Melody Hoffman, including the fact that it changed. his Facebook cover photo to an image of Jason Voorhees, the fictional killer from the “Friday the 13th” franchise, just over a day before the alleged murder.

“He (Jason Voorhees) stalks and kills people around Crystal Lake, usually using a machete,” Criminal Investigation Division special agent Marissa Mussman testified Friday. Louisma is accused of killing Hoffman along with co-defendant Dakota Van using a machete and strangling him. His body was found near Lily Lake in Amana, Iowa.

Crime scene investigator Kelsey Geomaat testified Friday about multiple items recovered from Louisma’s vehicle, including a blood-stained pocket knife and a roll of duct tape with traces of blood on the cardboard inside. Prosecutors also presented a receipt from Walmart for the purchase of a machete.

According to investors, Louisma’s DNA has not been found on any of the weapons recovered from her car. Louisma is also accused of kidnapping Hoffman.

Also on Friday, the fifth day of this trial, digital forensic experts testified about Louisma’s online activity before and after Hoffman’s disappearance. According to Mussman’s testimony, Louisma conducted multiple searches for Hoffman’s name on Facebook before his death, followed by searches for “Iowa Missing Persons Alert” and visits to Hoffman’s mother’s Facebook profile in the hours after he died. Prosecutors said Hoffman was murdered.

Mobile phone data presented to the court mapped Louisma’s movements on the night of February 17. Investigators testified that location tracking placed Louisma and Van Patten in Morgan Creek Park, where prosecutors allege Hoffman was first assaulted, before tracking Louisma’s phone on the road to Lily Lake.

Testimony also revealed that Van Patten had permanently deleted photos from his phone at the time of Hoffman’s death; that evidence is now destroyed.

Van Patten’s brother took the stand Friday. The couple lived in the same residence.

The trial has also revealed strains in the relationship between Louisma and Hoffman, who had recently broken up, exchanging several heated messages on Facebook. Prosecutors have suggested in their opening statements that Hoffman may have been pregnant at the time of her death, although such evidence has not yet been admitted in court.

Defense attorney Jill Eimermann has said the state’s evidence is circumstantial, emphasizing the lack of Louisma’s DNA on the recovered weapons. The defense team argues that while surveillance footage and digital evidence may place Louisma in certain locations, it does not definitively prove her involvement in Hoffman’s murder.

The trial continues Tuesday in Linn County District Court. If convicted of first-degree murder, Louisma faces life in prison without the possibility of parole.