Winnebago County Sheriff Gary Caruana, center, listens as Rockford Police Chief Dan O'Shea, left, identifies the suspected shooter in a triple homicide the night before as Duke Webb, of Florida, during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Webb, has been charged in the deaths of three people and the wounding of three more in Saturday's shooting at an Illinois bowling alley. (Scott P. Yates/Rockford Register Star via AP)

This booking photo provided by Winnebago County Sheriff's Office shows Duke Webb. Authorities say Webb, a U.S. serviceman from Florida has been charged in the deaths of three people and the wounding of three more in a shooting at an Illinois bowling alley on Saturday, Dec. 26, 2020. Winnebago County State’s Attorney J. Hanley said Sunday that Webb has been charged with three counts of murder and three counts of first-degree attempted murder in the shooting at Don Carter Lanes, in Rockford, Ill. (Winnebago County Sheriff's Office via AP)

Rockford Police Chief Dan O'Shea identifies the suspected shooter in a triple homicide the night before as Duke Webb, of Florida, during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Webb allegedly opened fire inside bowling alley Don Carter Lanes on Saturday, killing three people and wounding three others. (Scott P. Yates/Rockford Register Star via AP)

Rockford Mayor Tom McNamara talks about the suspected shooter in a triple homicide the night before during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Authorities said Sunday, Duke Webb, of Florida, has been charged in the deaths of three people and the wounding of three more in Saturday's shooting at an Illinois bowling alley. (Scott P. Yates/Rockford Register Star via AP)

Winnebago County State's Attorney J. Hanley stands by as authorities talk about the suspected shooter in a triple homicide the night before during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Hanley said Sunday, Duke Webb, of Florida, has been charged in the deaths of three people and the wounding of three more in Saturday's shooting at an Illinois bowling alley. (Scott P. Yates/Rockford Register Star via AP)

Rockford Mayor Tom McNamara talks about the suspected shooter in a triple homicide the night before during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Authorities said Sunday, Duke Webb, of Florida, has been charged in the deaths of three people and the wounding of three more in Saturday's shooting at an Illinois bowling alley. (Scott P. Yates/Rockford Register Star via AP)

Rockford Police Chief Dan O'Shea identifies the suspected shooter in a triple homicide the night before as Duke Webb, of Florida, during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Webb allegedly opened fire inside Rockford bowling alley Don Carter Lanes on Saturday, killing three people and wounding three others. (Scott P. Yates/Rockford Register Star via AP)

Rockford police and other law enforcement agencies investigate the scene of a shooting at a bowling alley Saturday, Dec. 26, 2020, in Rockford, Ill. (Scott P. Yates/Rockford Register Star via AP)

Rockford Police Chief Dan O'Shea identifies the suspected shooter in a triple homicide the night before as Duke Webb, of Florida, during a news conference at Rockford Police Department District 3 on Sunday, Dec. 27, 2020, in Rockford, Ill. Webb allegedly opened fire inside bowling alley Don Carter Lanes in Rockford on Saturday, killing three people and wounding others. (Scott P. Yates/Rockford Register Star via AP)