I don't believe that most investigators think the couple drove into a body of water. Sorry, but the FBI website alone negates that. In fact,
they have classified both Danielle and Richard under the subtitle of Kidnapped. FBI agent Vito Roselli, who was the first lead investigator on the case told CNN he "believes the missing couple were
victims of foul play (
bbm)." The FBI doesn't believe the couple is alive. They also believe there are people in their community who have knowledge of what happened.
Here's a really good Philly Mag article from 2014 that talks more about Danielle's personal relationships and the time leading up to her disappearance. They interview her family, as well as ex husband Joe Imbo. According to Philly Mag, Danielle's brother, John Ottobre, searched for the couple as soon as he noticed she was missing the day after.
Here's an excerpt (
bbm):
Danielle was married to her husband, Joe, at the time of her disappearance. After leaving her and the baby in 2004 for another woman, by 2005 he decided that he wanted Danielle back. However, she was already dating a new man, Richard Petrone.
According to FBI special agent Roselli:
Richard’s family initially believed that Danielle’s husband was involved:
According to Danielle’s brother, John, police told him that
Danielle and Richard may have been incinerated, or left inside Petrone’s truck and run through a compactor.
Joe Imbo sure had an interesting alibi:
The Philly Mag journalist, Steve Volk, interviews Joe Imbo: