If you want to contest your photo tickets, there are certain defenses you can offer. The Automated Traffic Enforcement Act, DC Code §50-2209.01 et. seq. provides the following information. DC Code §50-2209.02(a) provides that absent a crime or fraud the owner of the vehicle is liable for payment of the fine assessed for the infraction. DC Code §50-2209.02(d) provides that the owner is presumed not liable when:

1. Yielding the right of way to an emergency vehicle.
2. The vehicle or tags have been stolen prior to the violation.
3. Part of a funeral procession; or
4. Following the direction of a law enforcement officer.

You can find more information on the Council of the District of Columbia Website.