In a now-deleted Reddit post, a user references a blog post from 2009 written by a man named Brian McCorkle, which describes a woman living right outside the Avery family's property at the time of the murders. Estranged from her erratic, sometimes violent, fire-obsessed husband, whose last name was "German," the woman discovered that he'd visited her home (near the Avery compound) on the day of Teresa Halbach's murder, Oct. 31, 2005. "He [German] visited the Maribel area and had stopped at the rental before the lease began. He spoke of visiting an auto salvage yard. He commented that a woman wanted to take pictures of the rental property . . . and he felt that the photographer was 'stupid.'"
After this incident, the woman discovered that "her husband had scratches on his back and a cut finger that bled intermittently." Later, upon seeing a missing persons flyer showing Teresa Halbach, German remarked "she's dead." Following other suspicious incidents, the woman called the Manitowoc County Sheriff's Department, who arrested and charged her husband with disorderly conduct and resisting an officer.
In November 2005, the same woman discovered a number of suspicious items in German's home: bloody women's panties, fresh bones, a can of lighter fluid with bloody fingerprints, a mason's hammer covered in dark red flecks, graphic pornographic magazines, and surgical gloves. After reporting these things to the Manitowoc County Sheriff's Department during another of her husband's frightening episodes (for which he was arrested), the police rebuffed her by claiming that Teresa's clothing had already been accounted for and that the panties likely belonged to a child. However, the woman continued to believe that her husband was involved with Halbach's disappearance after moving cross-country to get away from him — and Teresa's clothes, supposedly accounted for by the police, were never presented as court evidence.
While the details and source of this story are iffy, many online commenters consider "the German" a viable suspect for Teresa Halbach's murder — especially because this account of the incidents was written so long ago. It's intriguing at the very least!