Overview
- Police say Joanna Walton was found shot inside her car at her League City apartment complex and her ex-boyfriend, Isaiah Johnson, turned himself in hours later.
- Court records show Johnson pleaded guilty in 2023 to aggravated assault with a deadly weapon against Walton and was sentenced to 30 days in jail plus 10 years of probation.
- A burglary arrest warrant filed in August 2025 after an alleged break-in of Walton’s apartment was not served at the time and records indicate it remained unexecuted until Johnson’s surrender.
- Harris County supervision officials told reporters they never received the 2025 warrant after probation was transferred to their office and the Galveston County district attorney declined to comment on notification efforts.
- Johnson is jailed with bond set at $360,000 while League City investigators pursue the homicide case and officials face calls to explain the supervision and communication gaps that may have left Walton at risk.