Casey Anthony's old defense attorney is seeing double after the "Dark Knight" massacre in Aurora, CO -- TMZ has learned, Jose Baez has been hired by a second victim of the shooting.
41-year-old Marcus Weaver -- whom James Holmes shot twice in the upper shoulder during the tragedy -- tells TMZ, "Over the past 30 days of agony, along with very careful thought and consideration, I have hired Attorney Jose Baez as my legal counsel."
TMZ broke the story ... Baez has already been hired by a woman named Shirley Wygal -- whose 32-year-old daughter was shot and killed by Holmes.
Now, Weaver says, "I felt that the night of the incident, that the security at the theatre was lacking from the time I entered. I want answers, we ALL want answers. And I know Attorney Baez will do what ever he can to help with the fullest extent of the law."
He adds, "Every day, early in the morning or at night, I have a movie in my head of what happened. I wake up every night with nightmares. I don't think it will ever go away."
Weaver finally underwent surgery last week to remove the bullets, which were then taken by police as evidence. It's unclear whether he plans to sue the movie theater.