A man whose brother was killed after allegedly leading a major Mexican drug cartel pleads guilty in the United States to drug trafficking-related charges, according to reports. He enters the plea in Washington, where prosecutors say he admitted to conspiring to traffic cocaine and methamphetamine into the U.S. The cases described are linked to his brother’s role with a powerful and violent Mexican cartel. Both outlets frame the matter as part of broader efforts to disrupt cross-border drug trafficking networks associated with Mexican cartel leadership. The reporting states that the man’s guilty plea is tied to agreements and conduct related to bringing the drugs into the U.S. The articles do not provide the man’s name or additional procedural details beyond the plea and the types of drugs involved. The next steps, including sentencing and the scope of any remaining counts, are not specified in the provided excerpts. Overall, the accounts align on the central points: a guilty plea in Washington, a conspiracy involving cocaine and methamphetamine, and a connection to a slain brother who led the cartel.