Purity: Touching a Corpse After the Three Ghusls
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 514:
If a person touches a corpse that has been given the three ghusls[1] completely, then performing this ghusl does not become obligatory for him. However, if one touches part of a corpse before the completion of the third ghusl, then even if that particular part of the corpse has been given the third ghusl, he must perform the ghusl for touching a corpse.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)
1
See Ruling 538.