Douglas Erhardt was killed in his Graham house before somebody lit it on fire July 24.
His flaming vehicle was found abandoned along state Route 410 in Greenwater shortly after his death, which was caused by sharp-force injuries to his head and neck.
Pierce County sheriffs detectives havent arrested anybody and are soliciting information from anybody who might have seen suspicious people or cars near Erhardts house in the 19300 block of 89th Avenue East the night before his body was discovered.
At this point, were looking for information, sheriffs spokesman Ed Troyer said.
Firefighters were called to the home about 4:30 a.m. July 24. They found his body after dousing the flames.
Investigators said Erhardt, 55, was active in online dating and used the name Joe when meeting dates. People Erhardt met online were often coming and going from his home, Troyer said.
Anyone with information is asked to call Tacoma-Pierce County Crime Stoppers at 253-591-5959.