This CBC report reveals that police were able to confirm the guilt of Calvin Hoover in the death of Christine Jessop because there was a sample of his blood on file from the investigation of his suicide in 2015. Hoover’s name was painstakingly brought to the surface by genetic genealogy work. In most such cases, it then requires police to obtain a sample from the suspect to confirm their suspicions. This is often done surreptitiously by digging around in his garbage.