Aaron Phypers is making a desperate plea to his estranged wife Denise Richards' family and friends, claiming she is in need of an immediate intervention. "This is the hardest letter I've ever had to write. I just [got] some of my contacts back, after being without my cell phone since the 4th of July," a copy of the letter reads in part. Us Weekly can exclusively confirm that it was sent via text and email to the pair's "family and close friends" around 10:00 am on Sunday, July 20. "This is a frantic cry to help a loved one," a source close to the couple told Us on Sunday.