According to this video http://www.youtube.com/watch?v=qhBHL6yx ... re=related at 8:15 it has a shot of Latoya arriving and it says she arrived at the hospital at approximately 3:15.
Also, Latoya's account of the hospital scene (from the Daily Mail, for all that is worth...)
http://www.dailymail.co.uk/tvshowbiz/ar ... start.html
"My father called me from Las Vegas and said, "Get to the hospital right away. Michael's been rushed to hospital."'
La Toya immediately rang her mother's personal assistant to be told her brother was being treated at UCLA Medical Centre in Westwood, a ten-minute drive from her home.
'I jumped into my car and kept calling my mother's assistant saying, "How is he? How is he?"' she recalls. 'But he wouldn't tell me.
'Finally, I heard Mother in the background asking, "Who is that?" When she learned it was me, she screamed, "Why don't you just tell her?" and she grabbed the phone and just screamed as loud as she could, "He's dead!"
'I nearly crashed my car. My legs went weak. I couldn't press down on the gas pedal. I got to the wrong entrance at the hospital and was begging the security guys to help me and take my car because I was so weak and faint. They took me up to the area where Michael had been taken. Mother was crying and Michael's kids were crying.
'I screamed, "Is it true?" and she said, "Yes, he gone." I couldn't stop crying. I'm screaming and the kids are screaming. My mother was sitting there with all three of them on her lap, just crying.'
She says Paris demanded to see her father 'one last time'. After a nurse told La Toya it would help the children grasp the reality that their father was dead, she held Paris's hand as all three children, together with Michael's brother Randy, went into the small ante-room off the emergency room where Michael lay, still warm to the touch..."
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In another article she gives a similar story - so it sounds like she got there after her mother, according to these articles. Neither article mentions Frank Dileo.
http://www.accesshollywood.com/la-toya- ... icle_22930