HOUSTON -

There's a mystery unfolding in one of Houston's most affluent neighborhoods -- a death inside a home that belongs to a well-known family.

Houston police are investigating a death inside an upscale River Oaks home owned by the Cullen family.

Police aren't giving many details, other than they received a call for a welfare check at the home on Kirby Drive near Shepard Drive at around 4:30 Friday morning.

Police said a man who appeared to have committed suicide was found inside.

According to county records, the home is owned by the estate of Roy Cullen, the legendary Houston oil man known for his many acts of philanthropy.

Since the body was discovered, several investigators with the Houston Police Department were seen in and around the house.

As of Friday evening, investigators still have not identified the man whose body was found, nor have they given any indication who occupied the home.