Darrell Brooks was allowed to go free on $1,000 bail after allegedly ramming his SUV into the mother of his child because the prosecutor in charge of the case “made a mistake,” Milwaukee County District Attorney John Chisholm says. Brooks was arrested on Nov. 2 after allegedly striking the woman and then running her over. But prosecutors recommended just $1,000 bail, despite his lengthy criminal history and the seriousness of the charges. He posted the bail on Nov. 11. Ten days later, Brooks was seen by witnesses using the same vehicle to plow into a Christmas parade in Waukesha, killing six and injuring dozens of others. Chisolm, a Democrat, said after the attack that the bail was “inappropriately low” and pledged a review. In his first public appearance since the tragedy, Chisolm said a pretrial risk assessment that flagged Brooks at the highest risk of committing fresh crimes if he …