SAN DIEGO—A 24-year-old inmate who died after falling ill at Vista Detention Facility last summer succumbed to an accidental drug overdose, authorities reported Dec. 6. Deputies found Ronaldino Estrada of Escondido unconscious and unresponsive in his cell at the South Melrose Drive jail on the morning of July 5, according to the San Diego County Sheriff’s Department. Paramedics took Estrada…