ImmigrationTALK: Substitute Sponsor if visa petitioner has died

Death can come at any moment or time. Unfortunately, when a petitioner of a family-based visa petition dies, so does the pending visa petition. Under the immigration laws, the approved visa petition is revoked upon the death of the petitioner unless the Attorney General determines that, for humanitarian reasons, revocation would be inappropriate. See 8 CFR § 205.1(a)(3)(i)(C).
http://www.kaieteurnewsonline.com/2012/04/01/immigrationtalk-substitute-sponsor-if-visa-petitioner-has-died/