In Illinois, the following criminal statutes may apply in cases where a death occurs from the delivery of illicit drugs, failure to call 911, or concealment of a body:

• 720 ILCS 5/9-3.3: Drug-Induced Homicide
  This statute explicitly criminalizes delivering a controlled substance that causes another person's death. A person convicted under this law can face severe penalties, including imprisonment.

• 720 ILCS 5/12C-50: Duty to Report
  Illinois has a "Good Samaritan" provision requiring individuals to provide reasonable assistance, including calling 911, when another person is in need of emergency aid. Failure to act may lead to criminal negligence charges.

• 720 ILCS 5/9-3.4: Concealment of Death
  This statute makes it a criminal offense to conceal a death to obstruct the determination of its cause or circumstances. Violations may result in significant legal consequences.

If federal statutes are relevant, such as under the "Len Bias Law," federal agencies like the DEA may collaborate with local authorities for prosecution.

For specific legal applications or advice, consult with an attorney experienced in Illinois criminal law.