40-year-old Shawn Roland Roberts was the last person to see his girlfriend, his mother his roommate and his wife alive.
All 4 people died in Roberts' presence within just a couple of years.
It was an exclusive FOX 26 investigation that brought this strange saga to light.
In September of last year, we reported on Roberts being charged with delivery of a controlled substance in connection with the 2007 death of his then girlfriend Tara Sganga.
"Shawn Roberts is the one who injected my daughter with the drug," Sharon Russell, Tara's mother said.
Research specialist Jim Carroll has spent the last two years trying to get justice for Tara's parents.
"I called Texas Rangers I called everybody I could I called the news media, "Carroll said, "I called you and you were the only one that pursued this case diligently, 100 percent."
Within months of Tara's death police reports state Roberts was with his mother when she shot herself to death.
Roberts was also present reports say, when his former roommate died from an apparent overdose.
The biggest shocker came 4 months ago when Robert's wife Amanda Linscomb was found dead from an apparent overdose.
While Roberts is not charged with any of the deaths his bond was revoked for allegedly doing drugs with Amanda the day she died.
"He's a very arrogant man he's conceited and he's covered his rear end up until now." Carroll said.
Roberts’ trial is expected to get underway on Monday.