A man was found dead under suspicious circumstances in a home in unincorporated La Mesa, prompting a homicide investigation Wednesday morning, the San Diego County Sheriff's Department said.
SDSO responded to a home off Explorer Road near Avocado Boulevard in unincorporated La Mesa at about 10:15 p.m. Tuesday after a man called to report a person in medical distress at the home.
Deputies arrived to find an man unresponsive and with wounds to his upper body inside the home, SDSO Lt. Chad Boudreau said. They attempted to revive him but, a half-hour later, pronounced him dead. The victim has not yet been identified.
Boudreau did not say if a weapon was found at the scene.
"Just the circumstances around the whole incident made it suspicious, that’s why the homicide unit responded," Boudreau said.
The man who called 911, later identified as Thomas Zupner, was detained by detectives and questioned at the Rancho San Diego SDSO substation.
Hours later, SDSO announced Zupner was arrested on a murder charge in connection to the case. Details on what led them to suspect Zupner were not released.
The relationship between the two men was not known.
Before the arrest, homicide detectives were entered the home and began their investigation inside. Boudreau said more information should become available after detectives have time to process the scene.
Deputies canvassed the area surrounding the home for any clues and interviewed neighbors to see if they noticed anything suspicious.
A portion of Explorer Road was closed in both directions for the homicide investigation.
The neighborhood is located north of State Route 54 and east of State Route 125.
No other information is available. Please refresh this page for updates on this developing story.