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Sentencing has been postponed for a man paralyzed in a Bluffdale neighborhood-watch shooting convicted of having sex with a 17-year-old girl.

A jury in March convicted David Serbeck, 39, of three third-degree felony charges of unlawful sex with a minor. His May 25 sentencing before 3rd District Judge Elizabeth Hruby-Mills was pushed back to June 1 because of possible competency issues.

"The time that I've been on this case, there hasn't been this concern," Salt Lake County prosecutor Alicia Cook said after Friday's hearing. "But mental illness can rise and fall at any time."

Serbeck's attorney, D. Scott Berrett, declined to comment.

The alleged victim, now 22, had testified she was 17 in the summer of 2007 when she and Serbeck had sex three times in his Magna home.

Serbeck was shot and paralyzed in July 2009 by fellow neighborhood-watch advocate Reginald Campos. Serbeck was patrolling the neighborhood and had apparently frightened Campos' daughter when he followed her car, which matched the description of a suspicious vehicle. At trial in 2010, Campos claimed he fired in self-defense, but a jury convicted him. He was sentenced to up to life in prison.

Neither Serbeck nor Campos — who did not know each other — was part of any organized, sanctioned neighborhood-watch group, but both had expressed an interest in stopping crime in the area.

Serbeck's victim said she came forward with her story after seeing news reports of the shooting because she believed Serbeck had been stalking Campos' daughter.