(CNN)In a new court-ordered effort to identify potentially thousands of additional immigrant families that the US government separated at the southern border, more than 1,700 cases of possible separation have been found so far.
At least 1,712 more kids may have been separated from their parents at the border
Cmdr. Jonathan White of the US Public Health Service Commissioned Corps says 1,712 cases with "some preliminary indication of separation" have been referred to US Customs and Border Protection for the next phase of review out of the initial pool of 4,108 children's case files that corps officers combed through.
Some of those cases ultimately might not involve separations, White said Friday in a federal court hearing.
"What we transmit to CBP is solely those cases that have some preliminary indication of separation," White said. "We err on the side of inclusion."
The new effort to track down parents and children who were split up at the border is the latest chapter in the ACLU's lawsuit over family separations.
While last year a court order in the case from US District Judge Dana Sabraw in San Diego forced the reunification of many immigrant families the government had separated at the border as result of its "zero tolerance" policy, an explosive government watchdog report in January revealed there could be thousands more separated families that officials hadn't previously acknowledged. Sabraw ruled in March that this group should be included in the class action lawsuit over family separations.
And in April, the judge approved the government's plan "designed to substantially identify all class members within six months."
In total, officials have said they'll need to review some 47,000 files dating to July 1, 2017.
Friday, White told Sabraw that the initial phase of case review was going more quickly than he expected. As of Friday, he said, his team has completed preliminary reviews of more than 13,000 files.
"We started running at this problem. .. .We are ahead of my operation targets that I had set for my own team at this time," White said.