Pilots Rufino James Crisostomo and Joel Martin also died in the crash.

Source: https://thenewdaily.com.au/news/world/asia-news/2023/02/24/families-mourn-aussies-lost-philippines-plane-crash/

The remains of pilot, Captain Rufino James Crisostomo Jr., mechanic Joel Martin, and Australian passengers Simon Chipperfield and Karthi Santhanam were set to be turned over to the Scene of the Crime Operatives for further investigation.

Source: https://newsinfo.inquirer.net/1737631/retrieval-operation-ends-after-bodies-of-4-cessna-plane-crash-victims-recovered

While that was considered a dead lead at the time, authorities have apparently since connected some dots and have associated that same vehicle with the shooting that killed Eliyanah Crisostomo.

Source: https://sfist.com/2023/04/14/two-men-in-custody-for-last-weekends-freeway-shooting-of-five-year-old-in-fremont/