I'd say this constitutes attempted felony manslaughter, maybe even attempted murder, as blinding people who are riding at the speedlimit, and on motorcycles, is most likely going to cause them to wreck, badly, get run over by other blinded riders and traffic... and likely die.
FWPD statement regarding the motorcycle video;
Although we have not received a formal complaint, we proactively began an investigation into the occurrence immediately upon receipt of the video this morning. As in any investigation, detectives attempt to locate witnesses and identify all persons involved.
The officer documented the entire incident in a report as well as on two cameras – his body camera and the dash cam of the patrol car. Officer Figueroa is a six year veteran and has been removed from uniformed patrol duties.
He has been placed in an administrative capacity pending the investigation. The Fort Worth Police Department takes any complaint of officer misconduct very seriously and this incident will be investigated thoroughly.
If anyone has information they are asked to please contact FWPD at 817-392-4270 or 817-335-4222
Update June 23rd 2016, He's back on patrol duty http://dfw.cbslocal.com/2016/06/23/officer-who-pepper-sprayed-bikers-is-back-on-patrol/