Arrests followed the release of surveillance images from the bus and an overnight search in the Westchase area.
HOUSTON — Two teenagers were taken into custody and charged after a woman was shot and killed on a METRO bus in west Houston on Wednesday afternoon, authorities said Friday. The shooting also injured a 16-year-old boy as the bus traveled near Richmond Avenue and Walnut Bend Lane.
Police and transit officials said the case moved quickly after investigators released surveillance photos showing two males who boarded the bus shortly before gunfire erupted. By late Thursday, both suspects were in custody. On Friday, prosecutors filed charges, including murder against the alleged gunman and unlawful carrying of a weapon against the second teen. The victim, a 25-year-old woman riding to work, was struck in the head and later died at a hospital. The attack rattled commuters and prompted METRO and Houston police to add extra patrols while detectives pieced together what happened.
Officers were called around 2:30 p.m. Wednesday to the 10800 block of Richmond Avenue, where the bus driver had pulled over and evacuated riders after shots were fired. Witnesses told investigators an argument broke out among people near the back of the bus before a teen raised a handgun and fired. The driver’s quick stop allowed passengers to exit; no other riders were hurt. A 16-year-old boy, believed to be part of the confrontation, was hit in the leg and taken by private vehicle to a hospital, investigators said. “This was senseless,” METRO Police Chief Ban Tien said, noting that the woman who died was not involved in the dispute. Detectives canvassed nearby apartments and businesses for video while drones and K-9 teams searched the area.
Authorities identified the victim as 25-year-old Caitlin Stup. One suspect, 17, was charged with murder after detectives said he fired the round that killed Stup and wounded the teen. A second suspect, 18, was charged with unlawful carrying of a weapon. Investigators said both boarded the bus moments before the gunfire. Harris County prosecutors sought high bail for the murder defendant, citing public safety concerns and prior probation for an earlier robbery case. The 18-year-old faced a lower bond on the weapons count. Officials stressed that the inquiry is ongoing, with ballistic testing underway and additional interviews planned. Detectives said they are still working to determine how the teens got the gun and whether anyone else helped them leave the scene.
Records show the bus route runs through the Westchase business district and several apartment complexes along Richmond Avenue. On Wednesday, officers closed streets near the Westchase Grand apartments as they tracked the teens’ path from the bus stop into the complex. The Houston Fire Department confirmed medics rushed the woman to a nearby trauma center, where she was pronounced dead. METRO said the driver, following training, radioed for help, stopped in a safe location and directed riders out through the doors. The agency said its buses are equipped with multiple cameras and microphones that record continuously, and those recordings were turned over to detectives the same day.
Prosecutors said a probable cause hearing for the murder charge is expected this weekend at the Harris County Criminal Justice Center, with a formal court setting to follow next week. The weapons case will track on a separate docket. Police said lab results on shell casings and bullets are pending, and they expect to compare the evidence with the handgun recovered during the arrests. METRO plans to brief its board on the incident at its next public meeting, while Houston police will release an updated timeline once forensic work is complete. Funeral arrangements for Stup had not been announced as of Friday afternoon.
Commuters at the Westchase Transit Center on Friday morning described a tense ride home the night before, when marked units shadowed buses along Richmond. “I saw the photos and recognized the bus interior,” said rider Monique Harris, who uses the line to reach her job off Westheimer. “They got them fast, but it’s still scary.” Business owner Luis Alvarez said employees asked to leave early Wednesday after helicopters circled overhead. “You never expect it at midafternoon,” he said. Neighbors set flowers at the bus stop’s bench by sunrise. A handwritten note read, “For Caitlin — you were just going to work.”
As of Friday evening, both teens remained in the Harris County jail as investigators prepared additional reports for prosecutors. Police said more details, including a full list of charges and any potential enhancements, could be released after the weekend court hearings.
Author note: Last updated January 9, 2026.