There's been no Mega Millions winning ticket since July 24. The current jackpot is $1.6 billion.
In the weeks before her death, Lauren McCluskey had complained she was being harassed by her ex-boyfriend, Melvin Rowland.
Chad Kelly, 24, was taken into custody at 1:17 a.m. in Englewood, Colorado.
"I am no longer able to participate in public life," O'Connor wrote in a letter addressed to "friends and fellow Americans."
Cosby was sentenced to three years to 10 years in prison for drugging and sexually assaulting Andrea Constand at the actor's home in suburban Philadelphia in 2004.