Officials said it is the first fatality in the city involving a shared scooter service.
Wendy Martinez was slain Tuesday night in what police believe was a random attack.
The District joins several states seeking ways to curb plastic firearms.
The 23-year-old asked fans not to judge him off media reports, writing “they gonna paint me a bad picture every time."
The incident caused significant travel delays.
Officials said tampering with fire hydrants poses a threat to public safety.
The victim was killed on T Street in Southeast D.C.
The District’s police officers are switching from light-blue shirts to navy.
Disciplinary action is possible against the worker, D.C. officials say.
The investigation stretched from Jacksonville to Baltimore as authorities searched for answers in the wake of the violence.