UPDATE: June 2014 -- No charges were filed against former Hedrick Middle School teacher Patrick Robinson after a grand jury review of the case, according to Lewisville Police Capt. Kevin Deaver.

A spokesman for the Lewisville Independent School District told HuffPost that Robinson was officially an employee of the district through June 1, 2012, although he "signed a resignation prior to that"; the district said it could not provide any more specific information. Robinson told HuffPost that he resigned in March, prior to the investigation.

The local NBC affiliate cited below has since taken down its initial report.

Previously:

Patrick Robinson, a 26-year-old teacher at Hedrick Middle School in Lewisville, Texas, is the subject of a local police investigation after three students reported the physical education teacher lifted them off the floor by their hair, WFAA-TV reports.

Parents of the students who were allegedly abused filed a compliant, and Robinson was placed on paid leave pending the results of the investigation.

Police Capt. Kevin Deaver told NBC Dallas-Forth Worth that, while Robinson has not been arrested, he could face three felony counts of injury to a child if the investigation yields sufficient evidence.

The Lewisville Independent School District confirmed that Robinson, who has worked at the school for two years, has since resigned for the rest of the current school year, according to the station.