Nearly two months after the murder, Fayed's estranged husband James M. Fayed, who was already in jail on unrelated fraud charges, was charged with his wife's murder.
Another suspect, 50-year-old Jose Moya, was also arrested two months after the fatal stabbing. The two have been awaiting trial in what prosecutors say was a murder-for-hire plot.
The criminal complaint filed against James Fayed alleges Fayed paid Moya about $25,000 to "arrange the murder" of Pamela Fayed.
The complaint also alleges that a sport utility vehicle rented by James Fayed through his gold trading company, Goldfinger Inc., was driven to the Watt Tower parking garage in Century City, where the victim was killed.
Prosecutors say the vehicle was spotted at the crime scene and driven to Fayed's ranch in Ventura County and returned the day after the killing by Moya to the rental car company.
Now, police say two other suspects, 21-year-old Steven Simmons and 45-year-old Gabriel Marquez are also in custody.
Simmons was arrested June 14 in Ventura, and Marquez was already in custody on an unrelated charge.
There are no details at this time regarding their suspected role in the plot.
If you have any information about this investigation, you're urged to call 1-877-LAPD-24-7.