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|Minor Character: Las Vegas|
|Family|| Julian Santiago (brother)|
Marta Santiago (mother)
Unnamed father (deceased)
Diana Santiago (sister, deceased)
|Pathology|| Serial Killer|
|Modus Operandi||Arsenic poisoning|
|No. of Victims||4 killed|
|Portrayed By||Georgie Flores|
|First Appearance||House of Hoarders|
"Are you sure about that... You said it yourself, I'm sick."
Alisa Santiago lived at home with her parents and brother Julian.
Her mother, Marta Santiago began developing a compulsion to hoard many items and objects from her life, leading to an additional development of "clutter-blindness," being unable to register items of clutter.
This eventually drove her father to his death after he had enough of his wife's compulsion.
Her brother, Julian Santiago couldn't wait to leave the crammed house and left immediately once he was old enough to work in a halfway house for orphaned teenagers which left Alisa by herself with her mother which would eventually drive her to madness.
Still in contact with her brother, she spoke to him regularly and Julian allowed her to work in his halfway house. This is where her taste for killing began.
Season Eleven Edit
House of Hoarders Edit
During one of Alisa's murders, her mother caught her burying the body. In an obscure attempt to protect her daughter from her herself and from murdering again, she chained her to a cot in a spare room, gagged her and blocked the door and floorspace under heaps of junk.
The LVPD went to Marta Santiago's house to inspect the overflowing house of rubbish where upon they found one of Alisa's victims after Nick Stokes accidentally stepped on the corpse.
The CSI team came and found four more of Alisa's victims and then found Alisa herself, tied up. The CSI's either believed Julian or Marta was the murderer, however, they were both wrong; it was Alisa.
Soon, enough evidence pointed out that Alisa was in fact the serial killer. Raymond Langston questioned her to which she responded how she enjoyed her killings.
After this, Marta and Julian were released. Alisa was institutionalized for her murders.
Alisa Santiago would lure male teenage orphans around her age and promise them sex with her. She would invite them to come to her house, to which they always replied a definite "yes." Once there, she would make them a meal or drink laced with arsenic which would kill them. She would then bury the bodies in her garden.
- June 7, 2008: An unidentified boy
- May 11: Ryan Hoff
- December 21: Derek Kennedy
- April 10, 2010: Matthew Price
- Alisa is the youngest serial killer of all in the CSI franchises so far.