A family that grew up in public is grieving in public, on its own terms. Cindy Crawford and Rande Gerber, alongside their daughter Kaia Gerber, posted emotional tributes on Instagram on Sunday to their son and brother Presley Gerber, praising his kindness and vulnerability.

Presley Gerber died at age 27 on September 20 at a rehabilitation facility in California. The Los Angeles County Medical Examiner lists the case as pending additional investigation, and police officials are investigating the death as a suspected overdose.

The Santa Monica Police Department has said there is no indication of foul play. A representative for the family told TMZ they are asking for privacy during what they called a very difficult and painful time.

Presley, a model who followed both his mother and his sister into fashion, had spoken in past years about his struggles, and Sunday's tributes dwelt on the person rather than the career: his openness, his humour and the effort he made to be honest about difficult things.

No further official findings have been released, and the examiner's investigation continues. OTMedia is reporting only the confirmed facts above and will update this story if authorities publish more.