Presley Gerber was under the influence of a substance when he checked himself into rehab one day before he died there, Page Six can confirm. The 27-year-old “did not appear sober” when he arrived at the Santa Monica rehab treatment facility this past weekend, TMZ first reported Monday. Presley — who is the only son of supermodel Cindy Crawford and husband Rande Gerber — was staying at Resolutions Living’s $7.7 million luxurious rehabilitation home when he died of a suspected overdose on Sunday. “The family is asking for privacy during this very difficult and painful time,” his family, which includes sister Kaia Gerber, 25, said in a…
