Smith said he did not believe the dirt bike riders knew the woman was a police officer. He said the suspects who assaulted her had not been identified.
"This incident underscores the dangers of dirt bikes on city streets," Smith wrote in an email, Police Commissioner Kevin Davis recently convened a dirt bike task force.
Taylor made headlines during the trial of Officer Caesar Goodson when she outlined her skepticism of the prosecution's case. Goodson, who faced a charge of second-degree murder in the death of Gray, was acquitted of all charges last week.
Taylor said in police records reviewed by The Sun that she found inconsistencies in a narrative provided to her in advance of a grand jury in Gray's arrest and death.
Taylor testified during Goodson's trial that she turned her notes over to defense lawyers, who objected that prosecutors didn't provide them at first. Prosecutors said in court that they didn't have the notes. Taylor later testified that she offered to provide her notes but that prosecutors didn't want them.
Baltimore Sun reporters Justin Fenton and Justin George contributed to this story.