Two keyboards, a keyboard bag, a guitar amplifier and a bass guitar were all taken from the church.
Police said that they received a tip that her remains could be in a field on the east side of Indianapolis.
The staff and students called their annual field day “Londyn’s Day.”
The petition has close to 10,000 signatures as of Thursday morning.
This case was not a missing person investigation, but was classified by officials as a swift water rescue.
29-year-old Desmond Aaron has been arrested for the murder of 26-year-old Amanda Hartley.
Police said she was distracted by her cell phone, which contributed to the crash.
Ritz kicked off her campaign in front of a small crowd outside Ben Davis High School with a call for unity.