PHOENIX (AP) — Offensive letters, tearful personal stories and reams of statistics have been shared as plaintiffs’ lawyers rested their case Tuesday in a racial profiling lawsuit against an Arizona sheriff and his department.

But legal experts say the group of Latinos who brought the civil case against Maricopa County’s Joe Arpaio, known by his supporters as “America’s Toughest Sheriff,” have a high bar to clear to convince a judge that there was systematic discrimination in the agency.