The family of former NFL star Doug Martin said he had been dealing with mental illness on the night he died in Oakland police custody.

Former NFL All-Pro running back Doug Martin has died at the age of 36, his family said in a statement on Sunday, with media reports identifying him as a man who died in police custody on Saturday.

"Privately, Doug battled mental health challenges that profoundly impacted his personal and professional life. Ultimately, mental illness proved to be the one opponent from which Doug could not run."...