♪la j aer a 60-secondphiladelphia. tonight, intimate conversations with his family.nd we go in depth with the police commissioner. how this shooting reveasystem, w we handle race, mental healthpo. we want to warn you, some of the images you're about to see are disturbing and graphic. ♪ here comes the bride ♪ >> i here now pronounce you husband and wife. you may kiss your wife, congratulations. >> reporter: dominique and walter wallace jr.'s wedding day last october sealed a love story years in the making. >> and you were pregnant at the time? >> yeah. >> how far along were you? >> any day now. >> reporter: mr. and mrs. wallace were already parenting four kids together. >> what did you think your future was going to look like? >> still being with our kids as a whole family. >> it was supposed to be happily ever after? >> yeah. >> reporter: less than a month afteredisalr llace jasolic alsiit of mental >>eportewaer fy had called 911 for help. officers encountering walter holding a knife. that's his mother, frantically trying to protect her son. >> ma'am, back up! put th