David Petersen was a low-odds, dark-horse chance that his family, the robbery division of the San Antonio Police Department and the 186th District Criminal Court decided to take. The 16 year sentence he accepted in plea bargaining was for two of twelve admitted counts of aggravated robbery. The chance was conferring them concurrently - two eight-year sentences - with trustee time credit possibilities.The promise was a number of habitual offender sentences,...