A wiki entry on Conservapedia on "Homosexuality and murders" states:
Dr. Eckert wrote regarding homosexual murders the following: "Equally high is the number of homicides, many probably related to transient attachments, which often lead to suspicion, jealousy, and murder. When murder does occur it is exceptionally brutal with an overkill appearance... Overkill, as it is seen in homosexual and lesbian murders, is certainly a form of sadistic crime. In these instances multiple stabbing and other brutal injuries...are common findings..."
Dr. Eckert's background is claimed to be the following:
According to the New York Times, Dr. William Eckert was a world-renowned authority in the field of pathology and he worked on major murder cases including the assassination of Senator Robert F. Kennedy and the Charles Manson murders. Dr. Eckert founded the American Journal of Forensic Medicine and Pathology. According to Time magazine, Dr. Eckert was a pioneer who encouraged collaborative effort between law-enforcement and forensics teams.
I should point out however that in recent years numerous studies have shown that the police have not been very kind to the LGBT community and with interactions with the police very poor and full of bias. For example, consider this urban.org article "“No Cops at Pride”: How the Criminal Justice System Harms LGBTQ People".
So, I wonder if these sources are biased against homosexual couples.