"Another deputy was planning on taking the (notice), but Brian grabbed it from him and said, `I'll take it.' He enjoyed doing it," McCleary said.
Before Caffall was taken from the scene, Rigo Cisneros, a neighbor and former medic, treated him.
"I started identifying his wounds and at that point he asked me to apologize to the officer he had shot," said Cisneros, 40.
The former medic said he has not put any thought into whether Caffall was being sincere.
"My only thought was with the officers that were wounded and killed. I could care less if I ever knew (Caffall's) name," Cisneros said.
Officials at Texas A&M, the 50,000-student school that dominates the city 100 miles northwest of Houston, said Caffall was neither a student nor school employee.
According to the Officer Down Memorial Page, a database of slain law enforcement officers, Bachmann is the first Brazos County constable killed in the line of duty since Randall Millican was gunned down in December 1889. Millican held the post in the same county precinct.