Constance Marten was tailed by her parent’s private investigators

The parents of aristocrat Constance Marten did hire private investigators to find their daughter, a court heard. Marten, 36, and boyfriend Mark Gordon, 49, are accused of killing their newborn baby Victoria by taking her on the run in January last year to prevent her being taken away by social services. The baby’s placenta was found in an exploded car on a Manchester motorway sparking a huge police hunt as the couple spent nearly two months camping in a blue…