The interfaith "Memorial of Light" service was held at St. John Vianney Parish in Hacienda Heights.
This service began with a church bell tolling for each year of Trinity's life and a 75-candle procession with the casket.
Members of the community who didn't know Trinity but were touched by her story showed up to the public service along with family members.
"I want to just thank the community for being here for my cousin Trinity Love Jones and may God bless each and every one of us and keep us in prayer," said Lashell Lewis, a cousin of Trinity.
Trinity's mother, Taquesta Graham, and the woman's boyfriend, Emiel Hunt, were both arrested for her murder.
Trinity's body was found inside a duffel bag earlier this month, dumped near an equestrian trail near Colima Road and Hacienda Boulevard.
MORE: Hacienda Heights girl killed: Makeshift memorial growing on trail where body found
During the past week, investigators learned Graham, Hunt and Trinity moved from a family member's home in Long Beach in May of 2018. During the past 10 months, the extended family had only seen or heard from the couple and Trinity just a few times, according to authorities. Investigators learned Hunt, Graham and Trinity were homeless just prior to her death and were residing in a Santa Fe Springs motel or in their vehicle.
Investigators previously believed the victim had been left at the location within 48 hours prior to the time of her body's discovery. Since then, additional information revealed that Trinity's body was actually left at the crime scene during the afternoon hours of March 1.
Anyone with relevant information about the case is urged to contact the sheriff's department's homicide bureau at (323) 890-5500. You can also submit anonymous tips by calling Crime Stoppers at 800-222-TIPS (8477).