On March 10, 2017, boaters discovered the body of 31-year-old Lisa Saenz, who had been shot to death and dumped in the Trinity River in Texas.
Kevin Kidd, Emmanuel Kilpatrick, and Jermon Simmons were arrested in September 2017 and charged with Saenz's murder. The Associated Press reported that Kilpatrick is serving a life sentence for killing a father and son, and Simmons was charged in another death.
One of the men, who was not named, told police that Riser played a role in the murders of Lisa Saenz and 61-year-old Albert Douglas. Douglas was reported missing in February 2017. His body has not been found.
In the affidavit, as reported by the Morning-News, the unnamed man said Riser offered to pay him $3,500 to kill Douglas. Riser then allegedly asked the man to kill Saenz, and offered $6,000 for the job. The affidavit stated Riser called Saenz an "informant."