HOUSTON — A gunman who was among three people killed in a shootout near Texas A&M University earlier this week fired more than 65 rounds and also took an officer's gun after fatally shooting him, police said Friday.

Police released a timeline of Monday's deadly incident in College Station, which lasted more than 20 minutes. The new details included authorities finding four weapons in the home of gunman Thomas Alton Caffall III – one of which was a handgun Caffall took from Brazos County Constable Brian Bachmann after he fatally shot him. The other weapons were a semi-automatic sniper rifle, an assault rifle and a bolt-action rifle.

Police said Friday that witnesses told investigators that Caffall approached Bachmann after shooting him and removed the gun from his belt. It did not appear that Bachmann's weapon had been fired, police said.

Caffall's family has said he was suffering from an unspecified mental illness and has stated, "It breaks our hearts his illness led to this." Four people also were injured in the incident – three officers, who have been treated and released, and a Houston resident who is still hospitalized.

Authorities said Bachmann, 41, had gone to Caffall's home near the university's football stadium to deliver a notice for him to appear in court on Aug. 23 because Caffall was at least two months behind paying his rent, owing $1,250.

According to the timeline, the first 911 call came in at 12:11 p.m. The caller said an officer had been shot, as well as his girlfriend.

That woman was later identified as 51-year-old Barbara Holdsworth, a Houston resident shot twice as she pulled her vehicle into a driveway located half a block from Caffall's home. She was in College Station to help her daughter move into a house before the start of the fall semester at Texas A&M, located about 100 miles northwest of Houston.

Other 911 calls quickly followed, indicating that another bystander, 51-year-old Chris Northcliffe, who had been checking a rental home he owned about a block away, had been shot. He later died.

Before officers arrived at the scene at 12:14 p.m., a civilian who was about a block away fired five to six shots at Caffall. Police did not identify this person.

After the officers arrived at the scene, Caffall immediately began shooting at them, retreating into his home between rounds of fire.

At 12:28 p.m., two officers used a patrol vehicle as cover to reach Holdsworth and Northcliffe. Northcliffe had already died.

Holdsworth was later taken to a local hospital, where she remained in intensive care Friday. Friends of Holdsworth posted Friday on a website about her recovery that she is improving, off life support and able to interact with family and hospital staff.

At 12:35 p.m., Caffall had been shot and secured by officers. Caffall later died.

Police are still trying to determine how many rounds officers fired during the shooting.

Funerals for Bachmann and Northcliffe are scheduled for Saturday. Thousands of people were expected to attend Bachmann's funeral service, which will be held at Texas A&M's Reed Arena.

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Online:

Site dedicated to Holdsworth's recovery: http://bit.ly/RicZvn

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  • ATF and other investigators walk near a vehicle which was struck by a bullet near the scene where a gunman opened fire near the Texas A&M university on Monday, Aug. 13, 2012, in College Station, Texas. A Texas law enforcement officer attacked as he brought an eviction notice to a house Monday was among three people, including a shooter inside the home, killed Monday near a Texas university. (AP Photo/Houston Chronicle, Mayra Beltran)

  • Law enforcement officials conduct a grid search of an area where police say a gunman was being served an eviction notice when he opened fire from inside a home near Texas A&M and killed a law enforcement officer Monday, Aug. 13, 2012, in College Station, Texas. Three people, including the gunman, were killed in the shootout. (AP Photo/Pat Sullivan)

  • A woman reacts outside of the College Station Medical Center, Monday, Aug. 13, 2012, in College Station, Texas where five victims were brought, following a shooting near the Texas A&M campus. A gunman and a law enforcement officer were among three people killed Monday in a shooting near a Texas university campus, police said. (AP Photo/Houston Chronicle, Karen Warren)

  • Law enforcement officials investigate an area where police say a gunman was being served an eviction notice when he opened fire from inside a home near Texas A&M and killed a law enforcement officer Monday, Aug. 13, 2012, in College Station, Texas. Three people, including the gunman, were killed in the shootout. (AP Photo/Pat Sullivan)

  • On The Scene

    Texas State troopers and Brazos Valley lawmen watch as an ambulance believed to be carrying one of their downed fellow officers speeds off to a hospital in College Station, Texas, Monday, Aug. 13, 2012. Police say at least one law enforcement officer and one civilian have been killed in a shooting near Texas A&M University's campus. Assistant Chief Scott McCollum says the gunman also was shot Monday before being taken into custody. (AP Photo/Bryan-College Station Eagle, Dave McDermand)

  • On The Scene

    Texas State troopers and Brazos Valley lawmen work the scene of the shooting of two fellow law officers, Monday, Aug. 13, 2012 in College Station, Texas. Police say at least one law enforcement officer and one civilian have been killed in a shooting near Texas A&M University's campus. Assistant Chief Scott McCollum says the gunman also was shot Monday before being taken into custody. (AP Photo/College Station Eagle, Dave McDermand)

  • Police On The Scene

  • Brian Bachmann

    Image via <a href="http://www.facebook.com/pages/Elect-Brian-Bachmann-for-Constable-Precinct-1-Brazos-County/156383397717359" target="_hplink">Facebook</a>

  • Brian Bachmann

    Image via <a href="http://www.facebook.com/pages/Elect-Brian-Bachmann-for-Constable-Precinct-1-Brazos-County/156383397717359" target="_hplink">Facebook</a>

  • Brian Bachmann

    Image via <a href="http://www.facebook.com/pages/Elect-Brian-Bachmann-for-Constable-Precinct-1-Brazos-County/156383397717359" target="_hplink">Facebook</a>

  • Brian Bachmann

    Image via <a href="http://www.facebook.com/pages/Elect-Brian-Bachmann-for-Constable-Precinct-1-Brazos-County/156383397717359" target="_hplink">Facebook</a>

  • Officers On Location

    Image from <a href="http://www.theeagle.com/article/20120813/BC0101/120819835/1148/bc01&slId=1" target="_hplink">The Eagle</a>

  • Scott McCollum

    Assistant chief of police speaking at press conference Monday afternoon

  • House Was Listed For Rent At Several Websites

    According to assistant police chief Scott McCollum, the shooting took place at 211 Fidelity Street in College Station, Texas. The house at that address was listed for rent on several websites including <a href="http://hotpads.com/rentals/211-Fidelity-Street-College-Station-TX-77840--2an7wqfbt2vwf#lat=30.6024989387755&lon=-96.336473&zoom=20&previewId=2an7wqfbt2vwf&previewType=listing&detailsOpen=true&dupeGrouping=building&listingTypes=rental,sublet,room,corporate&loan=30,0.04,0&resultsPerQuad=24" target="_hplink">HotPads.com</a>, <a href="http://www.postlets.com/rtpb/7982944" target="_hplink">Postlets.com,</a> <a href="me http://www.zillow.com/homedetails/211-Fidelity-St-College-Station-TX-77840/50327204_zpid/" target="_hplink">Zillow.com</a>, and <a href="http://apartments.oodle.com/college-station-tx/homes-for-rent/2-bedrooms/" target="_hplink">Apartments.Oodle.Com</a>,

  • Thomas Caffall

    This undated photo provided by the City of College Station, Texas shows Thomas Caffall. Caffall, 35, has been identified by authorities as the shooter who opened fire from inside his home in College Station as he was being served an eviction notice, killing Brazos County constable Brian Bachmann and another man, on Monday, Aug. 13, 2012. (AP Photo/City of College Station)

  • Family and friends of Constable Pct. 1 Brian Bachmann arrive at Christ United Methodist Church for a vigil, Monday, Aug. 13, 2012, in College Station, Texas, following a shooting that left three people dead, including Constable Bachmann near the Texas A&M campus. (AP Photo/Houston Chronicle, Karen Warren)

  • Brazos County Sheriff Chris Kirk, center, arrives for the vigil for Constable Pct. 1 Brian Bachmann at Christ United Methodist Church, Monday, Aug. 13, 2012, in College Station, Texas following a shooting that left three people dead, including Constable Bachmann, near the Texas A&M campus. (AP Photo/Houston Chronicle, Karen Warren)

  • Charles Ross listens to Hayden Behner describes the scene outside his home where police officers were taking cover and pointing toward the gunman near the location where a gunman opened fire in a residential area on Monday, Aug. 13, 2012, in College Station, Texas. A Texas law enforcement officer attacked as he brought an eviction notice to a house Monday was among three people, including a shooter inside the home, killed Monday near a Texas university. (AP Photo/Houston Chronicle, Mayra Beltran)

  • Diana Harbourt

    Diana Harbourt looks out her window where a bullet entered during a shootout on her street where three people, including the gunman, were killed, Monday, Aug. 13, 2012, in College Station, Texas. Police say a gunman was being served an eviction notice when he opened fire from inside a home near Texas A&M and killed a law enforcement officer. (AP Photo/Pat Sullivan)