In addition to photos, video, damaged items and clothing, more than you likely even know how to secure and preserve is the best answer.
If you're physically able, photograph the accident scene, your injuries, the e-bike or e-scooter, any vehicle involved, roadway conditions, traffic signs, skid marks, and visible damage. Save your helmet, damaged clothing, receipts, rental agreements, purchase records, and any available ride data or electronic trip information. According to the National Safety Council, photographs, witness information, and documentation gathered immediately after a crash can be critical to determining what happened and protecting your legal rights.
Unlike many automobile accidents, the condition of the e-bike or e-scooter itself may become key evidence. Avoid repairing, returning, or disposing of the equipment until its role in the accident has been properly evaluated.
Bottom Line from TWWLAWFIRM.COM
Evidence can disappear quickly after an accident. Your best move is to hire an experienced personal injury attorney as soon as possible to help you preserve evidence and document the scene so you can answer critical questions about how the crash occurred and who may ultimately be responsible later on.
(This legal/medical information is for general educational purposes only. While it applies in many situations, no attorney-client relationship is formed—which enables a lawyer to give specific legal advice—until you have spoken to the lawyer directly and retained him or her in writing.)